Thread: New Exhaust
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      08-24-2012, 06:44 AM   #17
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Drives: 08 E90 M3, 99 E36 M3 Turbo
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Location: Concord, NH

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Run 2 or 4 resonators in the x-pipe if it currently has no resonators or cats. Dinan and Borla run 4 resonators and are reasonable in sound. If running 2 regular or high flow cats, substitute them for 2 resonators (i.e., 2 cats plus 2 resonators is about like no cats and 4 resonators in terms of noise).
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