Active Autowerke BMW Sport Headers (11-009) Oversized - Dyno proven performance gains

- Dyno proven performance gains +11 Whp horsepower

GMC engineers did a pretty good job of finding a great source of fresh air

Typical results are around 400HP (wheel) at under 500' elevation and below 75 degrees F

Perfect for your vehicle and lifestyle

Active Autowerke BMW Sport Headers (11-009) Oversized - Dyno proven performance gainsThe Active Autowerke BMW Sport Headers (11 009) replace the restrictive factory headers on BMW E46 325i and 330i models to enhance exhaust flow and performance. The stock E46 headers feature integrated catalysts located close to the cylinder head, which generate excessive heat and restrict exhaust gas flow by combining cylinders one through three and four through six into single pipes, creating a bottleneck that limits power output. This performance