i wonder about this too.... i hear it depends on the E46 year im told that it sounds almost like stock on a 2001 sedan but ive heard it on an older E46 (i think it was like a late 90's) and it was pretty darn loud
only thing keeping me from installing it is not wanting the noise
I like the sound of the exhaust, not too much, not too little. Just a little deeper, throatier sound which increases as you accelerate. It doesn't bother me or my passengers when at highway speed. If you want everyone to know you're coming, it may not be the best for you.
As for a performance increase, I wouldn't say that it's particularly noticable but then I also have a Conforti CAI and shark injector, which will have a much greater performance impact.
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