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The aFe Twisted Steel long-tube header for 2001–2006 BMW M3 (E46) with the S54 3.2L inline-six is a catted stainless-steel header designed to improve exhaust flow. Constructed from 304 stainless steel with TIG welds and mandrel-bent tubing, the header is intended as a direct-fit replacement and is claimed by the manufacturer to deliver dyno-proven gains of about 15 horsepower and roughly 14 ft-lbs of torque while simplifying installation.
aFe Twisted Steel Headers (Catted) 01-06 BMW M3 L6-3.2L S54
