Max possible NA power gain staying legal?
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10-28-2012, 01:59 PM
BimmerPost Supporting Vendor
Drives: 08 E90 M3 / 400whp Turbo 7
Join Date: Apr 2008
Depends on what state you're in.
In California, pretty much no gain...
We get to be the C in CARB legal where as everyone else is less strict "ARB" legal.
I think technically even changing the rear section here is against the law.
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