If you have been waiting for a reasonably priced, high quality stepped header for the BMW E46 M3, well your wait is over. The CPI Single Step Headers were designed to maximize midrange torque while maintaining strong peak horse power. Dyno testing resulted in +15 horse power at 7,500 RPM and +12 pound/feet of torque @ 4,300 RPM over stock (at the rear wheels). On our test M3, with a software tune from TTFS, power output was 327 HP and 270 LBFT of torque at the rear wheels. These headers are perfect for the street or track (SCCA and autocross).
KEY FEATURES of the CPI Single Step Headers
UNIQUE DESIGN ASPECTS
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