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Old 01-02-2013, 08:42 PM   #4726
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Join Date: Oct 2012
Location: Boulder, Co
Posts: 32
My Ride: '05 M3 Carbon Black
Emissions w/ headers?

Originally Posted by 02m3csl325 View Post
I'd recommend bolt on's with a tune to compensate if you're not wanting to spend lots of money. I'd start with headers as those will make the most noticeable difference.
So everything I read has different solutions for this, but if I go aftermarket headers (would love to hear people's opinions on the best options, I'm currently looking at the supersprint stepped headers) what do I need to do to pass emissions? Is that possible? Do I have to put stock headers back on every year to pass emissions? I've heard running with no cats can cause torque loss due to low backpressure and awful smells. Please help?
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