Thread: How to make N55 355i sound like a 340i with MPPSK?
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      12-26-2018, 02:09 PM   #29
ctbear
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Drives: 2015 335i m-sport
Join Date: Dec 2018
Location: LA

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Quote:
Originally Posted by Insane435 View Post
N55 PWG 3.5"
N55 EWG 4.0"
B58 4.5"
=\ so still off by 0.5" dang

So is it as easy/straightforward as getting a 4.5" catted downpipe bolted on?
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