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      02-14-2012, 02:26 PM   #6
e1000
that's what SHE said!
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Drives: 2011 E92 M3 ZCP
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Quote:
Originally Posted by pbonsalb View Post
Catless or high flow cat x-pipe, pulley, and filter. No need to buy a $6000 exhaust. The rear exhaust does very, very little for power, but a lot of people like the sounds. It is the x-pipe that is responsible for most of the gains. After those mods, consider a tune.
You don't even need that, just a cat delete and a tune. The rest of the exhaust is fine. Most gains for the least trouble.
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