wholly between 07.00 and 22.00hrs. No primer is to be visible at any time.
2.4. c. Vehicles must not have wheel arch extensions unless fitted by the manufacturer as a standard item to the body shape.
2.5. d. All major internal trim as fitted to the body type by its original manufacturer when offering it for sale must be retained. Major internal trim includes headlining, inside door panels( which may be replaced with representative material) for all doors and / or rear side panels alongside the rear seat( for a 2 door car), carpets and rear seats. It does not include parcel shelves, boot carpet or boot side trims.
10.3.11.8. Roof vents are only permitted subject to the may only be fitted in compliance with Art. 10.1 above.
9.2. c11.9 Historic Category 2 and Category 3 Road Rally Cars are permitted to use matt black bonnets and wing tops subject to Art. 9.3 10.1 below above.
12. Engines 3.112.1 Other than for Vehicles in Category 1( Art. 8.4. a above), Vehicle engines must have:
a. A maximum of four cylinders. b. A maximum of two carburettor chokes( two single or one double). c. A maximum of one camshaft per bank of cylinders.
11.3 12.2 The ASN may also grant discretionary waivers for Historic Road Rally Cars complying with Art. 9.2 above in respect of Arts. 3.1 – 3.4 above as appropriate for For Historic Road Rallies and Historic Rallies with Special Tests held between 07.00 and 22.00hrs Arts. 12.1( a)-12.1( c) above inclusive do not apply providing an Historic Grade Eligibility Scrutineer is appointed.
12.1. 12.3. Forced Induction is permitted if by means of a mechanically driven supercharger or by an exhaust driven turbocharger if fitted as original equipment by the Vehicle manufacturer. Such Vehicles will be classified as having an engine capacity increased 70 %.
12.2 12.4. Engines must have Induction air filter elements and exhaust silencers must be fitted that ensure the Vehicle complies with noise regulations established in Ch. 13 App. 1 Art. 7 at all times.
12.3 12.5. Exceptionally and with the permission of the Chief Scrutineer those Vehicles for which 5000rpm is inappropriate may be noise tested at 3 / 4 of maximum rpm.
13. Wheels, Tyres and Brakes 13.1. Vehicles must always be fitted with tyres that are legal for use on the Public Highway.
13.2. The size of the wheel may not differ from that originally fitted by more than 10 % on nominal diameter and / or by 1 inch( 25.4mm) on nominal width. Wheels and tyres must fit within the standard unmodified external wheel arch profile.
13.3. Tyres must comply with Ch. 8 App. 4 Arts. 2— 3.
13.4. Vehicles must not be fitted with spiked or studded tyres or any non-skid attachments other than chains if permitted by the Official Documents.
13.5. A maximum of two spare wheels may be carried in competing Vehicles. All spare wheels must be securely fastened in position.
13.3.13.6. Vehicles originally fitted with 10 inch diameter wheels may increase to 12 inch diameter wheels. 13.4.13.7. The minimum diameter permitted is 15 inches unless a smaller diameter was fitted as original equipment.
13.5.13.8. The tyre section as marked on the side wall in millimetres or inches must not differ by more than 1 inch( 25.4mm) from that originally fitted.
13.6.13.9. The fitting of a dual master cylinder or any other type of device providing a simultaneous action on all four wheels and divided action on two wheels is permitted provided the original brake pedal and pivot point are used and it must be possible under all conditions, running or stationary, for 25 % minimum braking effort
Motorsport UK National Competition Rules 2026 Edition 5
Chapter 22 Appendix 13 – Rally( Chapter 13) 829