4 resonated or high flow cats????
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12-24-2012, 03:58 PM
Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH
Four resonators are quieter than two. But if you chose a rear exhaust that is obnoxiously loud with a stock midpipe, even an aftermarket midpipe with 4 resonators will still be louder.
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