FIA Sport - Appendix J to the International Sporting Code

ARTICLE 1 : GENERALITIES

1.1 Definition
Cars must be rigidly-closed non-convertible models.

Division 1: Touring cars:
Homologated in Group A (kit car and world rally car excluded) or in Supertouring and conforming to Appendix J Group A (Articles 251 to 255), the modifications listed in Articles 2 and 3 below are permitted.

Division 1A : Touring cars
Homologated in Group A with front-wheel drive and a normally aspirated engine, conforming to Appendix J Group A (Articles 251 to 255), the modifications listed in Articles 2 and 3 below are permitted.

Division 2: Production cars:
Homologated in Group N and conforming to Appendix J Group N (Articles 251 to 254) including the Rally requirements, but the modifications listed in Article 2, and 4 below are permitted.
The maximum cylinder authorised is 2000 cm3.normaly aspirated
Vehicles authorised : maximum 2 litres and 2 Wheel Drive.

Division 3: Autocross Single-seaters:
4-wheeled vehicles designed and built specifically for participating in Autocross.
The vehicles shall have 2- or 4- wheel drive. They must comply with Article 5 below.

1.2 Noise- Exhaust
For all the divisions.
A limit of 100 dB/A is imposed for all cars. The noise will be measured in accordance with the FIA noise measuring procedure using a sonometer regulated at "A" and "SLOW", placed at an angle of 45° to and a distance of 50 cm from the exhaust outlet, with the car's engine running at 4500 rpm.
A carpet of minimum 1.50 x 1.50 m must be placed over the relevant area of ground.
The exhaust system must include one or more homologated catalytic converters, which must work at all times and through which all the exhaust gases must pass.
The exhaust pipe must finish at the rear end of the car.

1.3 Fuel - Oxidant:
The cars must use unleaded fuel only (maximum 0.013g/l) complying with articles 252.9.1 and 252.9.2.

1.4 Tyres and wheels
1.4.1) Complete wheels
For Divisions 1 and 1A vehicle:
The complete wheel (flange + rim + inflated tyre) must always fit inside a U-shaped gauge of which the extremities are 250 mm apart, the measurement to be made on an unloaded part of the tyre.
The diameter of the rim is free but may not exceed 18".
For Division 2 vehicle:
Division 2 must comply with the article 254.6.4 of appendix J.

1.4.2) Tyres
Slick tyres are prohibited. Grooved tyres are authorised on the basis of a design homologated by the FIA.

* For tyres with a grooving rate of less than 25 %, the FIA will publish in his monthly bulletin the tyre designs which may be used.
These tyres may be moulded or grooved by hand to achieve an identical reproduction of the grooving design.

* For tyres with a grooving rate of over 25 %, the design is free.
The grooving rate will be calculated in accordance with the following rule:

1. Definition of the control surface
Tread pattern with a width of 170 mm (85 mm each side of the tyre centre line) and a circumference of 140 mm. In this area, the surface taken up by grooves at least 2 mm wide must occupy at least 17 % of the total surface.
The depth of the grooves must be at least 5.5 mm for moulded tyres when new (see drawing 279-5).

(INSERT TABLE)

2. The sum of the width of the grooves encountered by a circumferential line in the area described above must be at least 4 mm.

3. The sum of the width of the grooves encountered by a radial line must be at least 16 mm.

4. The bridge blocks and sipes must be considered as part of the tread pattern if they are less than 2 mm.

5. Hand-cutting is authorised on the basis of a moulded tyre homologated by the FIA.

6. At any time during the race, the depth of the grooves must be at least 2mm regardless of the type of tyres used and must cover minimum 75% of the surface.

ARTICLE 2 : MODIFICATIONS ALLOWED AND PRESCRIPTIONS APPLICABLE TO CARS OF DIVISIONS 1, 1A AND 2

The following prescriptions apply to all cars in addition to the prescriptions of Appendix J.

2.1 Rear lights:
Each car will be fitted with two red rear lights of the fog lamp type (minimum illuminated area of each light: 60 cm2; bulbs of minimum 15 watts each) working with or replacing the car's original brake lights. They must be positioned between 1.50 m and 1.00 m above ground level and must be visible from the rear.
They must be placed symmetrically in relation to the longitudinal axis of the car and in a transversal plane.
Rear lights equipped with LED are authorised.

2.2 Towing eye:
Must be fitted at the front and at the rear.
These eyes must not protrude beyond the perimeter of the bodywork seen from above.
They should be painted a bright yellow, red or orange, and must be fitted so as to be easy to find for the rescue in case of emergency.

2.3 Seats, attachments and supports
All the occupants' seats must be either original, modified only through the addition of accessories with a registered trade mark, or homologated by the EEC, the FMVSS or the FIA (8855/1992 or 8855/1999 standards), and not modified. In all these cases, a headrest must be present for each occupant.
The passenger seats and the back shelf of hatchback cars may be removed.
If the original seat attachments or supports are changed, the new parts must either be approved for that application by the seat manufacturer or must comply with the following specifications (see drawing 253-52):

1- Supports must be attached to the shell/chassis via at least 4 mounting points per seat using bolts with a minimum diameter of 8 mm and counterplates, according to the drawing.
The minimum area of contact between support, shell/chassis and counterplate is 40 cm2 for each mounting point.
If quick release systems are used, they must be capable of withstanding vertical and horizontal forces of 18000 N, applied non-simultaneously.
If rails for adjusting the seat are used, they must be those originally supplied with the homologated car or with the seat.

2- The seat must be attached to the supports via 4 mounting points, 2 at the front and 2 at the rear of the seat, using bolts with a minimum diameter of 8 mm and reinforcements integrated into the seat.
Each mounting point must be capable of withstanding a force of 15000 N applied in any direction.

3- The minimum thickness of the supports and counterplates is 3 mm for steel and 5 mm for light alloy materials.
The minimum longitudinal dimension of each support is 6 cm.

2.4 Windscreens and windows:
Must be of laminated glass or of a polycarbonate, and the windows must be of safety glass or plastic.
If of plastic, the thickness shall not be less than 5 mm.
Cars with laminated windscreens which are damaged to such an extent that visibility is seriously impaired or that there is a likelihood of their breaking further during the event, will be rejected.
Films, stickers and spraying are not allowed, except those authorised by the sporting code chapter 17, article 211.
Synthetic screens must not be tinted.
Tinted glass screens, e.g. heat shield screens, are only permitted if they are original for this car.
The fitting of an additional windscreen washer tank or of one with a greater capacity is authorised. This tank must be strictly reserved for the cleaning of the windscreen.

2.5 Spare wheels:
Prohibited.

2.6 Fuel tank:
If a non-original tank is fitted, it must be a safety tank homologated by the FIA (minimum FT3 or FT3 1999 specification) in accordance with the specifications of article 253.14.
The tank, the catch tank (buffer box), the pumps and all component of the fuel feed system shall be located at least 30 cm from the bodyshell in both lateral and longitudinal directions, outside the driver's compartment.
In all cases, the tank, including the filler pipe must be isolated by a firewall or by a container, both of which shall be flameproof and fire-resistant, preventing any fuel from infiltrating the cockpit and any contact with the exhaust pipes.
Should the fuel tank be installed in the boot and the rear seats removed, a fireproof and liquid-proof bulkhead must separate the cockpit from the fuel tank.
In the case of twin-volume cars, it will be possible to use a non-structural partition wall in transparent, non-flammable plastic between the cockpit and the tank arrangement.
The tanks must be protected effectively and securely attached to the shell or the chassis of the car.
The use of safety foam in tanks is recommended.
All the fuel pumps must operate only when the engine is running, or during the starting process.

2.7 Steering column:
Anti-theft devices must be removed.

2.8 Safety harness:
Compulsory, with at least six points conforming to the specifications of Article 253.6 of Appendix J.
The two shoulder straps shall have separate anchorage points.

2.9 Water radiator:
The water radiator and its capacity are free; its location may not be changed.
The fitting of extra cooling fans is permitted.
A radiator screen may be fitted, provided that no reinforcement of the bodyshell results.

2.10 External lights:
May be removed provided any resultant openings in the bodywork are covered and that the prescriptions of Article 2.1 are respected.
Covers must conform to the original general silhouette.

2.11 Safety rollcage:
Must be fitted, as defined in Appendix J article 253.8.

2.12 Carpets:
Carpets may be removed.

2.13 Extinguisher systems:
Installed automatic systems are recommended and compulsory for car homologated as from 01.01.99 and for cars of Division 1A.
They must be produced in accordance with art. 253.7 of Appendix J.

2.14 Mud flaps:
The fitting of mud flaps is allowed provided they respect Article 252.7.7.

ARTICLE 3 : PRESCRIPTIONS APPLICABLE TO AND MODIFICATIONS PERMITTED FOR CARS OF DIVISIONS 1 AND 1A, IN ADDITION TO THE PRESCRIPTIONS OF ARTICLE 2 ABOVE

3.1 Minimum weights:
Cars will weigh at least the following weights in relation to their cubic capacity:

(INSERT TABLE)

The cylinder capacity is limited to 1600 cm3 for Division 1A.

3.2 Bodywork - Chassis
3.2.1) Bodywork:
The original bodywork must be retained, except as concerns the wings and the aerodynamic devices allowed.
Trim strips, mouldings, etc., may be removed.
Windscreen wipers are free, but there must be at least one in working order.

3.2.2) Bodyshell-Chassis:
The series-production bodyshell and chassis must be retained but the original basic structure may be reinforced in accordance with article 255.5.7.1.
For Division 1 only :
The bodywork may be modified in accordance with drawing
279-1.
All the measurements will be taken in relation to the middle of the front and rear axles of the homologated bodywork.
The materials added must be ferrous and must be welded to the bodywork.
In order to put the catalytic converter, it is allowed to make a hollowing out in the central tunnel as described in drawing 279-2.

3.2.3) Doors, bonnets and boot lids:
Except for the driver's door, the material is free, provided that the original outside shape is retained.
Door hinges and outside door handles are free. The original locks may be replaced but the new ones must be efficient.
The original driver's door must be retained, trim may be removed.
The rear doors may be sealed shut by welding.
The locking devices on the bonnet and boot lid, as well as the hinges, are free, but each lid must be fixed at four points, and opening from the outside must be possible.
The original closing systems must be removed.
Openings may be made in the bonnet for ventilation, provided that they do not allow mechanical components to be seen.
In all circumstances, the bonnets and boot lids must be interchangeable with the original homologated ones.
It is permitted to remove the window opening mechanisms from all four doors or replace electric winders with manual winders.

3.2.4) Cockpit ventilation openings:
It is permitted to install one or two ventilation flaps in the roof of the car, in the following conditions :
- maximum height 10 cm
- displacement contained within the front third of the roof
- hinges on the rear edge
- total maximum width of the openings : 500 mm.

The heating system may be removed.

3.2.5) Underbody protection
The use of underbody protection is authorised in accordance with article 255.5.7.2.10, but any extension of this protection ahead of the front wheels is forbidden, unless it is situated strictly below one of the parts described in article 255.5.7.2.10.

3.3 Aerodynamic devices:
3.3.1) Front aerodynamic device:
The material and shape are of free design, limited by:
- the vertical plane passing through the axis of the front wheels and the horizontal plane passing through the lowest point of the door opening (drawing 279-3).
- the overall length of the homologated car.
- to the front, by the vertical projection of the bumper of the homologated car.

The material of the bumper must remain unchanged (plastic remaining plastic, including composite materials).
The safety elements allowing the absorption of impacts between the bumper and the chassis must be kept.
- Modification of the lateral part of the front bumper: according to the definition of the wing given by appendix 1 of the "Homologation Regulations for Group A and B Cars".

One or more openings may be made in the bumper (the part situated above the plane passing through the lowest point of the door opening), but the total surface of openings in the front shield must be no more than 2500 cm³.
These openings must not affect the structural integrity of the bumper.
The thickness of the front aerodynamic devices must be 2mm minimum and 5mm maximum.

3.3.2) Rear aerodynamic device:
It must have the maximum dimensions defined in drawing 279-4.
Even if the vehicle has original dimensions bigger than those maximum dimensions, it must comply with this drawing.
At its extremities, this device must join the bodywork, and it must be entirely contained within the frontal projection of the car without its rear-view mirrors.
The base of the box including the drawing must be the one with the largest dimensions. It must be positioned horizontally.
Further, this volume may be extended section by section, which means that at any point of the rear aerodynamic device, each section must not exceed the section 450 x 290 x 190, supports included.
This aerodynamic device must be contained within the frontal projection of the car, and within the projection of the car seen from above.
The thickness of the rear aerodynamic devices must be 2mm minimum and 5mm maximum.

3.4 Mudguards:
The definition of "mudguard" is that given in Article 251.2.5.7. of Appendix J.
The material and shape of the mudguards are free, but the shape of the wheel arches must be retained.
This does not imply that their original dimensions must be retained.
Any additional mudflaps must have a minimum thickness of 0.5 mm and a maximum thickness of 2 mm.
In all cases, the maximum extension authorised at the level of the front and rear wheel axis is 140 mm in relation to the dimensions given on the homologation form of the homologated car.
The mudguards shall project out over the wheels and provide efficient coverage over at least one third of their circumference and at least the entire width of the tyre.
Openings for cooling may be made in the mudguards.
However, should they be made behind the rear wheels, louvres must make it impossible to see the tyre from the rear along a horizontal plane.
It is permitted to install mechanical components within the mudguards, but their installation shall under no circumstances be used as a pretext for reinforcing the mudguards.

3.5 Lights:
Pursuant to Article 2.10, in each cover a hole with an area of 30 cm2 may be left for cooling purposes.

3.6 Engine:
The cylinder capacity is limited to 1600 cm3 for Division 1A.
The engine is free but the engine block must be from a homologated engine of the same original trademark as the car's original bodywork and must have the same number of cylinders as the engine originally homologated for that car.
The engine must be located in the original engine compartment.
Twin-engine configurations are not permitted unless homologated in that form.
Variable valve timing is not permitted.
Variable length inlet trumpets are forbidden.
Titanium is not permitted except in connecting rods, valves, valve retainers and heat shields.
The use of magnesium is not permitted in moving parts.
The use of any ceramic component is forbidden.
Internal and/or external spraying or injection of water or any substance whatsoever is forbidden (other than fuel for the normal purpose of combustion in the engine).
The use of carbon or composite materials is restricted to clutches and non-stressed covers or ducts.
Only a direct mechanical linkage between the throttle pedal and the engine load control device is permitted.
The tunnels used for the passage of the exhaust must remain open to the outside along at least two thirds of their length.
In Autocross only, exhaust pipe outlets which point downwards are prohibited.

3.7 Supercharged engines (Division 1 only) :
All supercharged cars must be fitted with a restrictor fixed to the compressor housing.
All the air necessary for feeding the engine must pass through this restrictor which must respect the following:
The maximum internal diameter of the restrictor is 45 mm.
This must be maintained for a minimum distance of 3 mm measured downstream of a plane perpendicular to the rotational axis situated at a maximum of 50 mm upstream of a plane passing through the most upstream extremities of the wheel blades (see drawing 254-4).
This diameter must be complied with, regardless of the temperature conditions.
The external diameter of the restrictor at its narrowest point must be less than 51mm and must be maintained over a distance of 5 mm to each side.
The mounting of the restrictor onto the turbocharger must be carried out in such a way that two screws have to be entirely removed from the body of the compressor, or from the restrictor, in order to detach the restrictor from the compressor.
Attachment by means of a needle screw is not authorised.
For the installation of this restrictor, it is permitted to remove material from the compressor housing, and to add it, for the sole purpose of attaching the restrictor onto the compressor housing.
The heads of the screws must be pierced so that they can be sealed.
The restrictor must be made from a single material and may be pierced solely for the purpose of mounting and sealing, which must be carried out between the mounting screws, between the restrictor (or the restrictor/compressor housing attachment), the compressor housing (or the housing/flange attachment) and the turbine housing (or the housing/flange attachment) (see drawing 254-4).
In case of an engine with two parallel compressors, each compressor must be limited to a maximum internal intake diameter of 32mm (internal diameter), 38 mm for the external diameter.
The exhaust gases from the waste-gate must exit into the vehicle's exhaust system.
Water injection is prohibited, even if it originally exists on the homologated block. Spraying of the intercooler is prohibited.
Supercharged cars must not be equipped with any device which allows the boost pressure, or the electronic management system controlling the boost pressure, to be adjusted by the driver while the car is in motion (except the throttle pedal).
Ceramic components, variable diameter inlets and adjustable internal vanes on turbochargers are forbidden.

3.8 Interior:
The trimmings situated below the dashboard and which are not a part of it may be removed.
It is permitted to remove the part of the centre console which contains neither the heating nor the instruments (according to drawing 255-7).
The dashboard must have no protruding angles.
The complete seat must be located entirely on one side or the other of the vertical plane of the longitudinal centre line of the car.
The bulkheads separating the cockpit from the engine compartment and the boot must retain their original place and shape.
Their material must be the same as or stronger than the original material.
Installing components up against or passing through one of these bulkheads is, however, permitted, provided that they do not protrude into the cockpit by more than 20 cm (as measured horizontally from the original bulkhead). This possibility does not apply to the engine block, sump, crankshaft or cylinder head.
In addition, the floor may be modified to house the four-wheel drive in accordance with article 3.2.2.

3.9 Fuel, oil and cooling water tanks:
Shall be isolated from the driver's compartment by means of bulkheads so that in the case of spillage, leakage or failure of a tank, no liquid will pass into the driver's compartment.
The same applies to the fuel tanks vis-à-vis the engine compartment and exhaust system.
The fuel tank filler cap shall not protrude beyond the bodywork and shall be leakproof.
The storing of fuel on board the car at a temperature of more than 10 degrees centigrade below the ambient temperature is forbidden.

3.10 Suspension:
Cars must be fitted with a sprung suspension.
The operating method and the design of the suspension system are free.
Front axle :
Modifications to the shell (or chassis) are limited to :
- the reinforcement of the existing anchorage points,
- the addition of material for the creation of new anchorage points,
- the modifications necessary to provide clearance for suspension components, drive shafts, and wheel and tyre.

The reinforcements and addition of material must not extend further than 100 mm from the anchorage point.
With the exception of subframes connecting the front to the rear, the front subframe is free as regards the material and the shape, provided that:
- it is interchangeable with the original part and that the original number of anchorage points remains unchanged.
- it can be dismounted (no welding).

Moving the anchorage points of the subframe is allowed provided that they are situated inside the new tunnel (see article 3.2.2, only for Division 1).
Rear axle (Division 1 only) :
Modifications to the shell (or chassis), to accommodate the changed position of pivot and mounting points, are limited to those in drawing 279-1.
The springing medium must not consist solely of bolts located through flexible bushes or mountings but may be of fluid type.
There must be movement of the wheels to give suspension travel in excess of any flexibility in the attachments.
The use of active suspension is forbidden.
Chromium plating of steel suspension members is forbidden.
All suspension members must be made from a homogeneous metallic material.
Hydropneumatic suspension systems are permitted, on condition that they do not have active control.

3.11 Transmission:

Division 1 :
Free, but traction control is prohibited; conversion to four-wheel drive is permitted.
Front and rear limited slip differentials must be mechanical.
"Mechanical limited slip differential" means any system which works purely mechanically, i.e. without the help of a hydraulic or electric system. A viscous clutch is not considered to be a mechanical system.
In the case of a 4-wheel drive vehicle, the addition of a hydraulic system or a viscous clutch to the central differential is allowed, in order to limit the slip, but this system must not be adjustable when the vehicle is in motion.

Division 1A :
Free, but traction control is prohibited.
Limited slip differentials must be mechanical.
"Mechanical limited slip differential" means any system which works purely mechanically, i.e. without the help of a hydraulic or electric system. A viscous clutch is not considered to be a mechanical system.
A viscous clutch is authorised if homologated.

3.12 Water radiator:
This article completes the article 2.9 for Division 1 only.
Its location is free, provided that it does not encroach upon the driver's compartment.
The air intake and outlet of the radiator through the bodywork may have, as a maximum, the same surface as the radiator.
Air ducts may pass through the cockpit.

3.13 Brakes:
Free, but there must be a double circuit operated by the same pedal and complying with following: the pedal shall normally control all the wheels.
In case of a leakage at any point of the brake system pipes or of any kind of failure in the brake transmission system, the pedal shall still control at least two wheels.
Anti-lock brake systems are not permitted.
The brake discs must be made from ferrous material.
A handbrake is obligatory; it must be efficient and simultaneously control the two front wheels or the two rear wheels.
Fluid tanks are forbidden inside the cockpit.

3.14 Mechanical components:
No mechanical component may protrude beyond the car's original bodywork, except inside the wings.

3.15 Steering:
The steering system and its position are free but only a direct mechanical linkage between the steering wheel and the steered wheels is permitted.
The steering column must be fitted with a retractable device in case of impact, coming from a series vehicle.
Four-wheel steering is forbidden.

3.16 Type of gearbox:

Division 1 :
Semi-automatic or automatic gearboxes with electronic, pneumatic or hydraulic control are forbidden.
Differentials with electronic, pneumatic or hydraulic slip control which are adjustable by the driver while the car is in motion are forbidden.

Division 1A :
A sequential gearbox is not allowed. The gearshift must be a H.
Semi-automatic or automatic gearboxes with electronic, pneumatic or hydraulic control are forbidden.
Differentials with electronic, pneumatic or hydraulic slip control which are adjustable by the driver while the car is in motion are forbidden.

3.17 Magnesium sheet:
The use of magnesium sheet less than 3 mm thick is forbidden.

3.18 Telemetry:
The use of telemetry is forbidden.

ARTICLE 4 : PRESCRIPTIONS APPLICABLE TO AND MODIFICATIONS PERMITTED FOR CARS OF DIVISION 2, IN ADDITION TO THE PRESCRIPTIONS OF ARTICLE 2 ABOVE

4.1 Minimum weight

(INSERT TABLE HERE)

All weight are checked with car in race condition without driver and driver equipment.
Ballast will be permitted according to appendix J article 252.2.2(first paragraph).

4.2 Brake
The brake must comply with article 254.6.5 of appendix J.

4.3 Camshaft
The camshaft is free but the dimensions A and B of the homologation form article 325 must be retained.

4.4 Transmission
4.4.1) Clutch
According to the group N regulations, article 254.

4.4.2) Gearbox
The series housing of the gearbox must be retained but the ratios are free.
The interior of the gearbox is free.
The maximum number of gears must be retained.
The articulation joints of the gearstick are free.

4.4.3) Final drive and differential
The use of a mechanical type limited slip differential is authorised, provided that it can be fitted in the series housing.
In order to allow its fitting, the interior of the original differential housing may be modified.
“Mechanical limited slip differential” means any system that works purely mechanically, i.e. without the help of a hydraulic or electric system.
A viscous clutch is not considered to be a mechanical system.
If the homologated vehicle is fitted with a viscous clutch, it may be retained, but it will not be possible to add another differential.
The original differential may also be locked.
The ratios are free.
The material of the gearing is free.

4.4.4) Driveshaft
The series driveshaft type must de retained, but the material is free except that composite is forbidden.

ARTICLE 5 : PRESCRIPTIONS FOR CARS OF DIVISION 3 (AUTOCROSS SINGLE-SEATERS)

These cars must comply with the following articles of Appendix J:

ARTICLE 251 (Classification and definitions):
2.1.9 Mechanical components
2.2 Dimensions
2.3.1 Cylinder capacity
2.3.8 Engine compartment
2.5.1 Chassis
2.5.2 Bodywork
2.5.3 Seat
2.5.5 Cockpit
2.7 Fuel tank

ARTICLE 252 (General prescriptions):
1.3 Magnesium
1.4 Conformity of the car
1.5 Damaged threads
2.1 Ground clearance
2.2 Ballast
3.1 Supercharging
3.2 Equivalence formula between reciprocating piston and rotary engines
3.3 Equivalence formula between reciprocating piston and turbine engines
3.4 Fuel injection
3.5 Equivalence formula between reciprocating piston engines and new types of engines
3.7 Starting on board the vehicle
4. Transmission
5. Suspension
7.6 Dangerous objects
9.1 Fuel
9.3 Air
10. Brakes

ARTICLE 253 (Safety equipment):
1 Dangerous constructions
2 Optional devices
3 Lines and pumps
8.3 Material specifications(1993 or 1995 App.J)
8.4 Homologation by an ASN
13 Circuit breaker
14 FIA approved safety fuel tanks
15 Protection against fire
17 Pressure control valves
Moreover, these cars must comply with Articles 1.2, 1.3, 1.4, 2.1, 2.2, 2.3, 2.8 and 3.13 of the "Technical Regulations for Rallycross and Autocross cars", and with the following:

5.1 Cylinder capacity:
The maximum corrected cylinder capacity is 4000 cm3.

5.2 Engine protection:
A protective hoop is obligatory for rear-engines.
The rear part of this hoop must entirely envelope the engine including the exhaust and its outlet.
This hoop must be braced in its centre.
This may be connected to the underneath of the vehicle or to the main roll bar. The tubes used will have a minimum wall thickness of 1.5 mm.
The protective hoop for the engine may be in several detachable parts, but in this case the joined tubes must be sleeved and the assembly effected by a bolt of 6 mm minimum diameter on each end of the sleeve, positioned at 90° the one to the other, separated by at least 30 mm. The diameter of the bolts to be used is at least 6 mm.

5.3 Lateral protection:
This will consist of composite honeycomb structures solidly attached to steel tube structures on each side of the car.
These tube structures must conform to the material specifications given in article 253.8.3. of Appendix J, with the exception of the dimensions of the tubes, which must measure at least 30 x 2 mm.
These structures must be fixed to the main structure of the car.
The minimum thickness of the composite panels is 15 mm, and they may be mounted on either side of the tubes (see drawing 279-5).
The outermost part of the protection shall be situated at the level of the centre of the wheel hubs, over a minimum length of 60 % of the wheelbase.
This protection shall extend outwards on both sides at least as far as the vertical planes passing through the middle of the foremost part of the rear tyres and through the middle of the rearmost part of the front tyres, but not further than the vertical planes passing through the outside of the foremost part of the rear tyres and through the outside of the rearmost part of the front tyres.
The space between this protection and the bodywork must be covered, to prevent wheels penetrating it.

5.4 Bodywork:
This must be impeccably finished, in no way of a makeshift nature.
It must not have any sharp angles or sharp-edged or pointed parts, and angles or corners must be rounded with a radius of not less than 15 mm.
At the front and at the sides there must be hard, opaque bodywork providing protection against stones.
At the front, this bodywork must rise at least to the level of the centre of the steering wheel, and its height must not be less than 42 cm measured from the driver's seat mounting.
The height of the side bodywork must not be less than 42 cm, measured in relation to the plane passing through the driver's seat mounting.
All mechanical elements necessary for propulsion (engine, transmission) must be covered by the bodywork or mudguards.
Seen from above, all parts of the engine must be covered by sturdy, hard and opaque bodywork; the sides of the engine may be left uncovered. The panels used must not be more than 10 mm thick.
An external rear-view mirror must be present on each side of the car. The reflecting surface of each of these rear-view mirrors must not be less than 90 cm2, and it must be possible to fit into this surface a square with sides measuring 6 cm.

5.5 Cockpit:
The width of the cockpit, maintained over 50 cm from the most rearward point of the seat in a horizontal plane towards the front, shall not be inferior to 60 cm.
No part of the cockpit, or situated in the cockpit, may have sharp or pointed parts.
Particular care must be taken to avoid any protrusion which could injure the driver.
The two safety rollbars must be high enough for a line extended from the top of the main rollbar to the top of the front rollbar to pass at least 5 cm over the top of the driver's helmet when he is seated normally in the car with his helmet on and his safety harness fastened.
A rigid roof panel above the driver is permitted.
Any transmission shaft joint situated beneath the floor of the cockpit must be enveloped by a band of mild steel at least 3 mm thick over a length of at least 25 cm, securely fixed to the chassis, in order to prevent the shaft from penetrating the cockpit or hitting the ground in case of failure of the joint.
No mechanical part other than the controls necessary for driving the vehicle may be situated in the cockpit.
It is obligatory that lateral protection be provided as follows for the two side openings of the cockpit:
These openings must be closed completely to prevent the passage of a hand or arm. This closing must be effected:
- either by netting with a mesh of 6 cm x 6 cm made from cords of at least 3 mm in diameter or with a mesh between 10 mm x 10 mm and 25 mm x 25 mm, the minimum diameter of the wire of which the mesh is formed shall be 1 mm.
This netting is to be fixed permanently at the top and rapidly detachable at the bottom from inside or outside;
- or by a wire grille with a maximum mesh of 6 cm x 6 cm, the wire being at least 2 mm in diameter or with a mesh between 10 mm x 10 mm and 25 mm x 25 mm, the minimum diameter of the wire of which the mesh is formed shall be 1 mm .
This grille is to be attached by two hinges at the top and having an external quick release device at the bottom, also accessible from inside the car (an opening may be made for this purpose), allowing the grille to be swung upwards to a vertical position.
- or by side windows made from polycarbonate, of a minimum thickness of 5 mm.

5.6 Weight:
The minimum weight of the vehicle, without the driver on board, must at all times during the event comply with the following scale of minimum weights according to the cylinder capacity, the number of cylinders, the type of engine and the type of transmission:

(INSERT TABLE HERE)

5.7 Fire-proof bulkhead:
A metallic fire-proof, flame-proof and liquid-tight bulkhead must be fixed to the floor of the car and to the two rear uprights of the rollcage. It must extend over the whole width of the rollcage; its upper edge will be at least 50 cm from the floor.
The floor will be closed.

5.8 Mudguards:
They must be firmly fixed. The mudguards must project over the wheels, and provide efficient covering of at least one third of their circumference and at least the entire width of the tyre, and descend towards the rear to at least 5 cm below the axis of the wheels.
In those cars where the mudguards form part of the bodywork or are entirely or partly overhung by parts of the bodywork, the mudguards-body combination or the body alone shall nevertheless meet the above-mentioned protection requirements.
Mudguards must have no perforations or sharp angles.
Should it be necessary to reinforce the mudguards, this may be done with iron rod of 10 mm maximum diameter, or with tubing with a maximum diameter of 20 mm.
Under no circumstances may the mudguard reinforcement be used as a pretext for the construction of crash bars.

5.9 Suspension:
The axles must be sprung. The mounting of axles directly onto the chassis is not allowed.

5.10 Steering:
The system is free.
The steering column must be fitted with a retractable device in case of impact, coming from a series vehicle.

5.11 Throttle:
There shall be a positive means of closing the throttle in the event of failure of the throttle linkage, by means of an external spring operating on each throttle spindle or slide.

5.12 Fuel, oil and cooling water tanks:
They shall be isolated from the driving compartment by means of bulkheads so that in the case of spillage, leakage or failure of a tank, no liquid will pass into the driving compartment. The same applies to the fuel tanks vis-à-vis the engine compartment and exhaust system.
The fuel tank must be an FT3 or FT3 1999 type and be situated behind the seat.
It must be mounted in a sufficiently protected location and be firmly attached to the car.
It must not be in the driver's compartment, and must be separated from it by a fire-wall.
Unless the fuel tank is isolated from the engine and the exhaust by a leak-proof, non-inflammable bulkhead, this tank must be situated at least 40 cm away from the cylinder head and the exhaust system.
The filler caps of this fuel tank must be leak proof and must not protrude beyond the bodywork.
The capacity of the fuel tank must not exceed 20 litres.

5.13 Dynamos, alternators, batteries:
Dynamos and alternators may be removed, but each car must have a fully charged battery.
The use of any outside source of energy to start the engine of the car on the grid or during a race is forbidden.

5.14 Fuel lines and pumps:
Fuel lines, oil lines and brake lines must be protected externally against any risk of deterioration (stones, corrosion, mechanical breakages, etc.), and inside the cockpit, as far as the fuel circuit is concerned, against all risks of fire. There must be no connections on the lines situated in the cockpit.
Automatic fuel-flow cut-off: It is recommended that all fuel feed pipes going to the engine be provided with automatic cut-off valves located directly on the fuel tank which automatically close all the fuel lines under pressure if one of these lines in the fuel system is fractured or leaks.
The vent lines should also be fitted with a gravity activated roll-over valve.
All the fuel pumps must only operate when the engine is running, or during the starting process.

5.15 Wheels and tyres:
The maximum diameter permitted for wheels is 18 inches.
Tyres manufactured specifically for agricultural use or marked for use at limited speeds are prohibited.
If wheels made from a material other than steel are used, the competitor must provide documentary evidence that these wheels have been supplied for a series production car either as original equipment or as alternative equipment.
Home-made constructions are prohibited.
The complete wheel (flange + rim + inflated tyre) must always fit inside a U-shaped gauge of which the extremities are 250 mm apart, the measurement to be made on an unloaded part of the tyre.
Twin wheels and wheels fitted with chains are forbidden.
Studded tyres are forbidden.
Tyres fitted with "knobbly" treads or rubber studs are not permitted unless by decision of the stewards of the meeting when the weather conditions are unfavourable and thus compromise the good running of the race.
Tyres with the following characteristics are not considered as "knobbly" or with rubber studs:
- no gap between two blocks measured perpendicularly or parallel to the tread may exceed 15 mm.
In the case of wear or tear of the corners, the measurement will be taken at the base of the block. In the case of circular or oval blocks, the measurement is taken at the tangent of the blocks;
- the depth of the tread may not exceed 15 mm.
These measurements do not apply over a width of 30 mm at the edge on each side of the tread, but the blocks may not extend beyond the vertical plane of the tyre walls.
Spare wheels is prohibited.

5.16 Parking brake:
Obligatory; it must be efficient and simultaneously control the two front wheels or the two rear wheels.

5.17 Rear light:
Each car must be fitted with one red rear light of the fog lamp type (bulb of minimum 21 watts), clearly visible from the rear. It must be positioned between 1.50 m and 1.15 m above ground level.
It must be possible for the driver sitting at his steering wheel to switch it on.
Rear lights equiped with LED are authorised.

5.18 Competition number:
This must be displayed once on each side of the car and on each side of a panel on the roof or on the engine bonnet.
The car must bear no other number likely to be confused with it.
The roof number must be permanently fixed on a vertical support, 24 cm x 35 cm, with no sharp edges and must be positioned along the longitudinal axis of the car. The number must be 18 cm high and the strokes forming it must be 4 cm thick.

5.19 Windscreen:
Must be of laminated glass or of a polycarbonate, and the windows must be of safety glass or plastic.
If of plastic, the thickness shall not be less than 5 mm.
Cars with laminated windscreens which are damaged to such an extent that visibility is seriously impaired or that there is a likelihood of their breaking further during the event, will be rejected.
Films, stickers and spraying are not allowed, except those authorised by the sporting code chapter 17, article 211.
Synthetic screens must not be tinted. Tinted glass screens.
The windscreen may be replaced, or protected, by a metal grille covering the entire surface of the windscreen opening. The mesh size shall be between 10 mm x 10 mm and 25 mm x 25 mm, and the minimum diameter of the wire of which the mesh is formed shall be 1 mm.
In cars which have a laminated glass windscreen or which have the metal grille defined above and no polycarbonate windscreen, motorcycle type goggles or a visor fitted on the helmet must be worn by the driver.
Apertures of a total area not exceeding 64 cm2 may be made in the windscreen.

5.20 Safety cage:
It is obligatory and must comply with articles 253.8.1, 8.2, 8.3, 8.4. Nevertheless, for cars built before 01.01.95, in accordance with articles 253.8.1, 8.2,8.3, the minimum dimensions of the tubes making up the cage are 38 x 2.5 mm or 40 x 2 mm.

5.21 Mudflaps:
It is obligatory to fix mudflaps behind the driven wheels, made of a flexible material and with a minimum thickness of 5 mm.
The mudflaps must be situated no more than 5 cm above the ground and cover at least the whole width of the complete wheel and must not exceed this width by more than 5 cm.
With the exception of a transversal mudflap in front of the rear wheels, to protect the engine, any other system of mudflaps or protection under the car is forbidden.

5.22 Driver's seat
A complete, FIA-homologated seat is recommended (8855/1992 or 8855/1999 standards). This seat may not be modified in any way.
A seat which has not been homologated by the FIA may be pierced to allow straps to be passed through it. These straps must comply with the traction angles shown in drawing 253-42.
The shell of the seat must then be reinforced locally so that it at least retains its original resistance, and the trim must protect the straps from any risk of deterioration.
The seat must be securely fixed; if it is mounted on rails, or if it has an adjustable back rest, it must be additionally secured so as to be absolutely immovable and rigid. The seat shall include a headrest.
The dimensions of the headrest shall be such that the driver's head cannot be trapped between the rollbar and the headrest.

ARTICLE 6 : MODIFICATIONS FOR 01/01/2004

3.12 Water radiator:
Its location is free, provided that it does not encroach upon the driver's compartment.
The air intake and outlet of the radiator through the bodywork may have, as a maximum, the same surface as the radiator.
Air ducts may pass through the cockpit.
The floor must not be modified for the passage of air ducts.
This article completes the article 2.9 for Division 1 only.