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E Chassis N55 MHD Back End Flash Maps
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Tyson413
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Posts: 26
Join Date: Oct 2017
Car: 2012 BMW 135i
10-22-2017, 09:54 AM
Hey guys. I finally installed MHD BEF in my car. Everything is fine but one thing. I have
c a t l e s s d o w n p I p e s and my check engine light is on. Can you tell me why? I didn’t check the box where it says oem down pipe.
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