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      10-01-2013, 07:09 AM   #11
Fo Shizzle
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Drives: 2011 E90 ZCP ///M3
Join Date: Oct 2012
Location: NoVA

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2011.75 BMW M3  [3.63]
They helped complete the package and throw out about 20hp. I doubt they would pass a smog inspection. The SES light would come on every so often, so a tune with an auto-clear function is a must. I was lucky that my state did not require it.
Originally Posted by s!ke View Post
How much did the downpipes help with power? Will it still pass smog with those cats?
BMW 2011.75 E90 ZCP M3 Jet Black | Dinan Intake/Tune/Exhaust/Underdrive/Strut Bars | Lux V4 | OSRAM 5500K CBI | 25% Tint | garage queen Sunday driver.

*M3 E90 OEM chrome grills, OEM pulley w/ belts for sale! If interested, please send me a PM.*