Ive just disconnected the little vacuum hose on my 328 and am quite happy with the result. well....it will keep me happy till I can save enough pennies for a new cat back exhaust.
2 questions though, 1. will this "mini mod" have any effect on the fuel consumption or anything else?
2. what cat back system would members reccomend that will give me a nice throaty sound. -M3 like. Will a M3 backbox bolt straight on?
Last edited by ozyshane; 03-04-2010 at 08:34. Reason: -
The M3 back box is not a direct bolt on fit. The bores of the M3 pipe are about 3/4 inch bigger than the 2.8/2.5 exhaust. I had a specialist exhaust fabrication company cut and weld the M3 pipes to fit mine.
I think it cost me about £200 for all the exhaust work including removing the cats, which is about the same price as an aftermarket cat back..
a small one...a golf tee does the same job and this is why this mod is sometimes called the golf tee mod
I did have to heave on the pipe to get it off the actuator and tore the end off the pipe, but i just cut it straight and screwed the screw in
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