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I don't know, Per, I kinda think the resonators do more to reduce drone than overall sound. Even HFCs at 100cell seem to make very substantial differences in sound decrease vs straight downpipes. Borla has a quad resonator catless pipe that won't be too much pocket pain if you don't like it. I've only heard that thing on a stock exhaust, but my bet is on any aftermarket muffler it will drastically increase decibels.
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e90M3, sold: Akrapovic // Brembo // VRS // Eisenmann // Advan RS // ESS // Challenge |