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BMW 3-Series (E90 E92) Forum
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N54 4inch exhaust
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06-06-2020, 06:13 PM | #1 |
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N54 4inch exhaust
Cant find any info on the topic so I'm posting this. Seeking honest thoughts on running a 4 inch straight pipe with an aftermarket resonator on my e90 n54 with upgraded turbos and CL dps.
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06-06-2020, 06:41 PM | #3 |
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Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
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I could see maybe 3". I don't think 4" has ever been done, at least I've never read about on this forum.
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06-06-2020, 06:41 PM | #4 |
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I can’t see a point in going 4inch. My corsa exhaust is 3.5 and it still a little on the large side. It has taken a few different shops to have it aligned properly without touching.
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06-06-2020, 09:03 PM | #8 |
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Yup lol. Once you have catless dps, you wouldn’t see a performance difference with 3 inch vs 4.
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