In Reply to: Re: How good is stock M3 exhaust - what kind is it posted by Bruce on May 11, 1999 at 21:06:33:
From what I have heard, upgrading the exhaust on an M3 doesn't do much. The M3 exhaust is very good to begin with (maybe a little too heavy). I have a SuperSprint that I just installed last weekend and this is how the M3 should've sounded from those MPower guys. I got it mostly for the sound.
The M3 exhaust is a great, inexpensive upgrade for the 323/325/328. Most guys are selling their old exhausts for about $200-$300.