| CHARACTERISTIC | TYPE 1: UNMODIFIED, ROAD REGISTERED VEHICLES | TYPE 2(a): SLIGHTLY MODIFIED ROAD REGISTERED VEHICLES | TYPE 2(b): MODIFIED ROAD REGISTERED VEHICLES | TYPE 3: VEHICLES MODIFIED FOR RACING | TYPE 4: VEHICLES SUBSTANTIALLY MODIFIED FOR RACING |
| Registration. | Must be road registered. | Must be road registered. | Must be road registered or capable. | No requirement. | No requirement. |
| Bodywork and dimensions: lightening. | Not lightened in any way other than removal of spare tyre, tools & other loose items. | Lightening such as removal of seats and bumper bars. | Medium lightening such as removal of seats, floor coverings, sound deadening material and bumper bars. | As for Type 2. | No restriction. |
| Bodywork and dimensions: roll cage. | Half cage only permitted. | As for Type 1 | As for Type 1. | Permitted. | Permitted. |
| Bodywork and dimensions: front air dam & rear spoilers. | Spoilers and air dams are free if they were factory fitted or factory options. | As for Type 1. | Aftermarket spoilers and air dams are permitted if road legal. | Air dams and spoilers are free within CAMS regulations. | As for Type 3. |
| Bodywork and dimensions: glass panels. | No replacement permitted. | No replacement permitted. | No replacement permitted. | Glass may be replaced within CAMS regulations. | As for Type 3. |
| Bodywork and dimensions: panels. | No replacement permitted. | No replacement permitted. | No replacement permitted. | Removable panels, door skins, front guards & front aprons may be replaced with light weight panels of identical external shape | Panels are free. |
| Bodywork and dimensions: body seem welding. | Not permitted. | Not permitted. | Not permitted. | Permitted. | Permitted. |
| Bodywork and dimensions: location & type of battery. | No modifications to battery location or type permitted. | Free battery and battery location within CAMS regulations. | Free battery and battery location within CAMS regulations. | As for Type 2. | As for Type 2. |
| Engine: modifications. | No engine modifications permitted except air filter elements are free but filter housing must remain unmodified. | Engine modifications permitted but retains standard carbs/fuel injection, valves, pistons, inlet manifold. | Engine modifications permitted, carbs/fuel injection, valves, pistons. | Larger than standard capacity Alfa engine for that vehicle permitted but same configuration (eg. 4 cylinder) | Engine modifications are free. |
| Engine: Carburettor. | No modifications permitted. | No modifications permitted. | Modifications permitted if road legal. | Free carburettors and fuel injection but carburettors cannot be converted to fuel injection. | Carburettors and fuel injection are free. |
| Engine: other. | No modifications permitted. | No modifications permitted. | Modifications permitted. Cam Shaft. | Free valves, pistons, cams, cooling system, fuel system within CAMS regulations. | Engine modifications are free. |
| Exhaust | Exhaust but must retain original headers and be complete to rear of vehicle. | Exhaust system may be replaced with after market units providing that no modification to the vehicle is required for fitment and the system is road legal. | Exhaust system may be replaced with after market units providing that no modification to the vehicle is required for fitment and road legal. | Exhaust is free within CAMS regulations. | Exhaust is free. |
| Transmission | No modifications permitted. | Transmission and differential must be from the same series of cars and must retain ALFA casing and mounting points. | Transmission and differential must be from the same series of cars and must retain ALFA casing and mounting points. | Free transmission and differential modifications but must retain Alfa casing and mounting points. | Transmission and differential are free. |
| Suspension. | No suspension modifications except shock absorbers that must be equivalent to the original and non-adjustable. | Limited suspension modifications including: * springs & torsion bars are free (rates and size only) but must use original location/mounting points. * rubber bushes can be replaced with nolathane or Polyurethane bushes incl. 105 castor balljoints; and * free antiroll bar size but must be in original location. * roll centre changes. | Limited suspension modifications including: * springs & torsion bars Are free (rates & size only) but must use original location/ Mounting points. * rubber bushes can be replaced with Nolathane or Polyurethane bushes incl. 105 caster ball joints * free antiroll bar size but must be in original location * roll centre changes. | Free suspension but must use original location/mounting points with the exception of 116 series cars that may have the watts linkage modified. Rose joints permitted within CAMS regulations. Roll centre changes. | Suspension is free. |
| Brakes. | No brake modifications permitted except pads which are free. | Modifications permitted but brakes must be from the same series of cars or bolt on using original mounts on calliper and upright. | Modifications permitted but brakes must be from the same series of cars or bolt on using original mounts on calliper and upright. | Free brake modifications within CAMS regulations. | Brakes are free. |
| Wheels: alignment. | Free wheel alignment adjustment in accordance with manufacturers recommendations and/or normal wheel alignment principles. | As for Type 1. | Free so long as still suitable for road use. | Free wheel alignment within CAMS regulations. | As for Type 3. |
| Wheels: size. | Rolling circumference and width of complete wheel must be as per original fitment. | Wheel sizes may be increased in both diameter and width by up to 1” (2.54mm) over manufacturers original specifications. | Wheel sizes may be increased in both diameter and width by up to 1” (2.54mm) over manufacturers original specifications. | Free wheel and tyre sizes up to 8” width. | Wheel and tyre sizes are free. |
| Wheels: track. | No modifications. | As for Type 1. | + 1” track. Offsets may be non standard if road legal. | Wheel track is free within CAMS regulations. | As for Type 3. |
| Tyres. | Tyres must be standard road radials, not “R” series and not wider than 205’s, unless standard for model. | Road tyres that are not wider than 215’s series unless this was standard for the model and not including R or slick tyres. | Road tyres not wider than 225’s series unless standard for the model including road legal R but not slick tyres. | Free but not slicks. | As for Type 2 but slick tyres permitted and no width restriction. |
| Cockpit/driver’s compartment: interior. | All seats and interior trim in place to manufacturers standards or equivalent. | Free driver’s seat and steering wheel. | Free driver’s seat and steering wheel. | Seats and interior trim are free. | Seats and interior trim are free. |
| Cockpit/driver’s compartment: seat belts and harnesses. | Seat belts and harnesses are free. | Seat belts and harnesses are free. | Seat belts and harnesses are free. | Seat belts and harnesses are free. | Seat belts and harnesses are free. |
| Fuel. | Standard commercially available fuel. | Same as Type 1. | Same as Type 1. | Fuel type is free within CAMS regulations. | Fuel type is free. |
| General. | No other mechanical or structural changes are permitted. | Same as Type 1. | Same as Type 1. | Free within CAMS regulations applicable to the category within which the vehicle is logged. | As for Type 3. |
| Replacement parts. | Non original replacement parts must not enhance performance in any way. | Same as Type 1. | Non original parts may enhance performance. | Replacement parts are free. | Replacement parts are free. |
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