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      10-28-2014, 09:22 PM   #7
jwalker87
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Drives: '08 335i, '11 335xi, '01 Z3M
Join Date: Jul 2010
Location: Pittsburgh, PA

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I have similar mods to you and went with VRSF. Perfect fitment, beautiful construction, and they're all the same performance-wise. JB4 has an auto-clear mode, but I'm still going to buy a DP-fix, as the auto-clear will auto-clear other codes as well, possibly masking developing engine issues. Also, if you have a smog inspection in your state where they check for a Check-Engine-Light, the computer they hook up will still see the code and you will fail. The DP-fix simulates the correct input from the rear O2 sensors and the car thinks all is well.

I did not go with any ceramic coating, but I haven't heard too much on either side of that issue.
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2001 M Roadster 5spd - stock
2003 e46 325xiT 5spd - stock
2008 e90 335i 6spd - modified!
2011 e90 335xi 6spd - lightly modified