^^^ John,

one thing I am not sure of is if they are just picking up the technical regs, or also picking up the classes that Octagon run. There are further liberties for Early Modern cars over modern. Eg Homologated weight less 10% in EM, but limited to homologated weight in Mod.

But main ones are E85, 2"wider and 2" increase in diameter wheels. You can fit as big a set of brakes as you can fit. For memory gearbox must be same number of gears, although you might be able to run a dog box. (Have to read up and check) No sequential allowed unless it came with one.

Intercoolers are free to an extent. (max thickness 80mm?? for memory) Cant recall if you can go front mount on a WRX. (Not that I would personally) Obviously wasnt an issue on the EMO as they came factory with one. Can fit hard pipes etc as well. Must run factory airbox but can change intake pipe. Oil coolers are free. Radiators free.

Worth having a read John. Not too much to get through.

__________________
Rotor of Fail
Ducati 998s
Ducati Streetfighter S
496 CI Injected Big Block. Carbon positive???