American Racing Headers use larger primary tubes and matching oversized front section to reduce restriction compared to the factory system. ARH E9X M3 header system is designed for race cars with bigger cams, stroker kits, or forced induction and need a racing header system to keep pace with other upgrades.
Our experience with race S65 is that the a 4-to-1 design produces good high-end horsepower. ARH headers feature merge collectors with scavenger spikes and a vortex scavenging design. Primary tubes on this set are the larger 1 3/4" (45mm) for maximum flow capacity. Each merge collector exits at single 3.0" outlet with straight test pipes, cat-delete, and a resonator will clamp to any rear axle-back muffler system. Non-cat systems are only for race use. This is the resonated version that will dampen volume on restricted tracks. Non-resonated exhausts are also available.
+ Made in USA
+ 100% 304 stainless steel
+ TIG welded inlets
+ 3/8" thick laser-cut flanges
+ Flow-optimized primaries
+ Tuned x-pipe
+ High-flow resonators
Notice of Emissions Non-Compliance.
This product is intended only for racing vehicles that may never be used, or registered or licensed for use, upon a public highway. Removing, disabling, or altering emissions equipment on a pollution-controlled road vehicle is illegal. Installing devices or software that trick, disable, or modify emissions controls and monitors on a pollution-controlled road vehicle is also illegal. This product is sold only for racing, competition, track, hobby, or other off-road use. It's use is prohibited in any motor vehicle that is subject to emissions inspection or control. It is not legal for installation or use on any pollution controlled motor vehicle in any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations. BimmerWorld may confirm a customer's racing license, entry, track participation, and we may ask for photos or proof of a permanent race car build. We reserve the right to cancel part(s) that are not for legitimate racing or track purposes.
E90 / E91 / E92 / E93 (06-13) > M3