I have just bought a replacement backbox for my 328 and wondered whether there is anything i can do to it prior to fitting that might improve performance etc?
Also anypne gpt experience with the M50 manifold?
I've bought a kit and won't fit it till i have some more info, best chip/ECU flash, induction kit? i think i can make my own induction kit from carbon fibre if anyone has some advice?
Anything else i need to think about? injectors etc etc