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

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      01-14-2013, 06:50 PM   #1
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Gutted stock DPs

So I decided to gut my stock dp's, i was surprised it only took me about 30mins. I'm going to put them back on for a final dealer visit........ But I think I'm going to leave them after, I know they won't flow as well. But I can't imagine hp loss is that much compared to aftermarket.
I searched and didn't find any comparisons.
Anyone have a Dyno comparison ?

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      01-14-2013, 10:13 PM   #2
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If you're running stock turbo w/aggressive tune you'll be ok.
The stock DP's are great because they are double layer = less noise.

Aftermarket DP flow better tho due to size, less bends
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