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BBZ4MC · 03-17-2018, 08:00 PM

Do the mufflers increase HP at all? How much? Relatively easy to replace by myself? I'm very new to the whole game--just got my '07 Z4MC about a month ago.

03-17-2018, 08:00 PM	#18
BBZ4MC New Member 2 Rep 6 Posts Drives: 2007 Z4 M Coupe Join Date: Feb 2018 Location: Atlanta iTrader: (0) Garage List 2015 Jeep Cherokee ... [0.00] 2007 BMW Z4 M Coupe [5.00]	Do the mufflers increase HP at all? How much? Relatively easy to replace by myself? I'm very new to the whole game--just got my '07 Z4MC about a month ago.
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