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      11-21-2019, 02:26 PM   #9
BMWILUVU
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Drives: 340ix
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Quote:
Originally Posted by bimmer456 View Post
The mppsk doesn't void warranty and has its own warranty and the pops and bangs can sound like gunshots and echo off walls and overpasses. Somehow it does this without voiding emissions warranty.
I think MHD and Bootmod3 lets you turn up the burbles and all of that extra fuel igniting in the exhaust is probably why his cat or sensor is gone.
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