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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 > Advice on next mods to reach 500hp?



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      04-01-2020, 10:05 PM   #45
nicky dj
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[QUOTE=MEN54;25997446]
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Originally Posted by nicky dj View Post
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Originally Posted by MEN54 View Post
All sound related. If you're getting downpipes and want to muffle sound go catted, I'd you want slightly more flow go catless. Either in California will cause you to not pass smog, not sure about New York.
If dp upgrade is sound related then why MHD Stage 2 plus require high flow cattles/catted down pipes?
In response to you original question - secondary cat delete and vibrant resonators are sound related, and no effect on emissions.

Depending on manufacturer catted hi flow DP's versus hi flow DP's are negligible in performance difference. Either is required for Stage 2+.
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      04-13-2020, 06:16 AM   #46
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If you are going for 500+ you are going to need a LPFP, and for the upgraded inter cooler I would recommend VRSF. I run the VRSF inter cooler and my intake temps dropped like crazy. I got the 7.5 inch so I can support going up to the 500+ mark. The build quality is great and it comes with a black powder coated aluminum lower charge pipe. Fits great and is what I would go for. You also (in my opinon) would want to run reallocated inlets, I'm going for the VRSF one's that will help with the throttle response a bunch.

I also run VRSF Dps with no cats but that only if you are brave.

I got some pictures below of all the mods I've done. The best part is all these parts are way more affordable than most other companies and the quality is awesome. Also I'm going to run a VRSF exhaust as well just to get the best airflow, not a necessity but is a really nice touch.
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Last edited by BMW335isBoi; 04-13-2020 at 06:23 AM..
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