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      12-26-2012, 12:05 PM   #8
Zebra99's Avatar

Drives: 2011 335is E93
Join Date: Aug 2011
Location: Ontario

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Originally Posted by james008
I just replaced my raceland DP's for the OEM pipes so that I can go in for DME updates. I am also at 67,000 miles and am anticipating the possibility of needing turbos under warranty. Some interesting things I have noticed switching from catless to OEM, slightly quieter startup and drone on highway, a noticible difference in initial pickup, boost is about .3 or .4 higher with OEM DP's and my oil cooler temp was about 10 deg. cooler which seemed kinda wierd. I do have 2.5 inch pipe and resinators for mufflers which is the cause of a lot of drone and noise.
If you're boosting more with OEM DP's then you have a problem lol...

The aftermarket DP's flow much better than stock so there is no reason that they should hold less boost.