Quote:
Originally Posted by kitw
CARB doesn't certify axle back exhausts for the M3 since none of them touch emissions equipment.
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Correct! As long as you don't mess with the cats, you will be fine. To further clarify, anything you do AFTER the cats is not an emissions issue. If you messed with the cats (any of them), O2 sensors, etc. you would run into issues. But, installing an axle-back is fine.