Just did mine. Except I kept the Hemholtz chambers and completely deleted the muffler and straight piped it out the back. Sounds great. Feels slightly quicker and I know I lost some serious weight. I did mine at RAD Motorsport. My friends heard it today and say its pretty loud. Your videos make it sound much louder that what it seems to me. But I have never actually heard it from the back of the car. The car is louder though for sure. Pretty hard to compare it with other M3s that I have heard here in HI.
Last edited by 808elise; 11-30-2011 at 10:54 PM..
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