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      08-27-2011, 07:11 PM   #24
1speedbike
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Drives: 2022 X4 M40i, 2008 135i
Join Date: Jun 2008
Location: MKE

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The Berk is probably the best sounding and loudest. If you want to save some money, you can just gut the muffler, or cut it out and install a straight pipe, but it might not sound as nice as the purposefully engineered berk unit.

Technically speaking though, no axleback at all (a cutout of some sort) would be the loudest
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2022 X4 M40i - 2008 135i - 2015 F700GS
On Order - 2024 i4 M50

Scruffy's gonna die the way he lived... Mmhm.


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