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      07-25-2017, 04:33 PM   #18
Jdub679
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Drives: 2011 BMW 335i coupe M Sport
Join Date: Jan 2011
Location: Irvine, CA

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Quote:
Originally Posted by DrRobert View Post
Air intake will not give you a lot of bang for the buck if it is power you are after. Intercooler, CP and JB4 or a custom tune are good ideas. I don't think it is realistic for you to expect to reach 400 WHP and stay CA smog legal, at least not on crap CA pump gas.
I agree with this. And I've personally shied away from a downpipe (catted or otherwise) because of CA's smog laws. I would put my vote in for MHD though. I had my JB4 for 5 yrs and it was great, but it's a PITA to remove the thing every time you go into service. Flashing the MHD is about as easy as things get.
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