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      12-07-2019, 08:50 PM   #1
Bpark1977
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Drives: E92 M3
Join Date: Mar 2012
Location: Orange county, ca

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What mods when emissions don't matter?

So in a few more weeks, WA is doing away with emissions requirements. What would be some beneficial mods that are no longer "off limits"? I'd rather not make it any louder, but are there some intake/ecu/exhaust changes that can be made to help low end or increase mpg without power loss? The supercharger is always "out there" but I'm thinking more of something in the 1-2k cost range.

Any help is always appreciated.