looking to install headers in the M3 any reccomendations?
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09-11-2012, 10:59 AM
Cruising in Top Gear
Join Date: Aug 2011
Location: Brampton / Mississauga
Car: E46 Sedan
A 325 running catless headers gained 11whp.
Expect more if going catless, or around the same if they're just high-flowing.
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