Classic Modified Saloons are 2WD & 4WD Saloon, Coupe, Hatchbacks and Estate cars based on a standard steel production shell which was marketed before 2011. Cars not complying with these criteria may be eligible, subject to CTCRC Committee approval.
The Thunder Saloon Championship is for competitors participating in Saloon, Coupe, Hatchback and Estate cars based on the standard fibreglass or steel production shell and designed to carry at least four people which were marketed before 1st January 2011 and Historic Thunder Saloon Cars marketed before 1st January 1983.
Details are as follows:
|Engine:||All internal engine components are free.|
|Gearbox:||Clutch and clutch operating system is free but electronic operation is prohibited unless fitted as standard.|
|Brakes:||Brake systems are free provided that Championship Regulations are respected.|
|Suspension:||Suspension is free provided that Championship Regulations are respected.|
|Tyres:||Must fit within the confines of the bodywork in accordance with MSA regulations.|
The Class Structure is as follows:
|Class A4:||All four-wheel drive normally aspirated induction system cars. (No upper cc. limit)|
|Class A4T:||All four-wheel drive forced induction system cars. (up to a maximum limit of 2200cc).||Class A2:||All two-wheel drive cars|
|Class D:||All vehicles eligible for classes A4. and A2 with a power rating of less than 300 BHP at the flywheel.|
|Class S:||Space frame cars|
|Class H1:||Historic cars 3,300cc and over|
|Class H2:||Historic cars up to a maximum of 3299cc.|