hi lads iv just started making my exhaust for my FOCOS which is 3"inch pipe .
i just wonted some in put into so forts iv got . the car will be road and track used 4x4 cosworth . i was thinking about only running 1 Box on it but would it be to loud for the track with just one . all so dose the Box have to be at the back or could it be in the middel only ?. the very back pipe will stay at 3"inch pipe and will be slashed . any help on this would be brill thanks