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      09-18-2016, 06:12 AM   #51
RyanDavies
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Drives: 2012 128i MSport
Join Date: Sep 2015
Location: Washington, DC

iTrader: (2)

If you haven't built a race exhaust yet, both Kyle and I have substantial performance increases from the designs we sorted out. Mine weighs 16(!) lbs more, but is stock-like sound (80.3 DB). I'll be swapping the heavy rear muffler for a Borla ProXS at events next year, it's actually too quiet. Had it v-banded post-resonator, so easy to swap.

I run the same headers. They're fine, but IMO there'd be a good bit gained from a custom route. Packaging demands and $$ prevent me from wanting to bother.
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