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      06-05-2014, 02:05 AM   #7
Route 16
I got lei'd
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Drives: '10 E90 M3
Join Date: Sep 2011
Location: Dark Side of the Moon

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primary cats should still be installed, I am willing to bet that the midpipe after the primary cat is larger in diameter. Stock is 2inches, the resonator pipe 2 1/2. Achieve this sound, the midpipe needs to be 2 1/2, the resonator pipe needs to be 3 inches, no muffler, no resonator. If you add magnaflow, it will not sound like that.
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