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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > DPs recommendations



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      04-25-2011, 10:30 AM   #45
ar design
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Any catless / off road pipe is going to throw a CEL. Most piggybacks now have a DPFIX built in, or we also sell one separately.
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      05-03-2011, 09:15 AM   #46
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Originally Posted by stooken View Post
Does anyone know if the same aggressive tone/spool sound exists on the catted versus catless dps?
+1, I'd like to know this as well.

Also, can anyone tell me from experience if I would pass California emissions if I used AR or MS catted DPs paired with an exhaust with removed secondary cats?

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