When deciding on the right exhaust the hardest part is feeling confident in the best sound mixed with increased performance, this really leaves you to guess based on reputation. Fortunately, Supersprint has the reputation covered when it comes to BMW exhausts. For over 60 years their goal has always been designing and building the highest quality exhaust available. This has been achieved through extensive testing using real race teams to get the best feedback there is to offer, from the ones who demand the best everyday. Extensive dyno testing, high quality materials, and race team feedback are what allow Supersprint to extract the power from your engine, not just the noise.
These Supersprint 'Partial-Stepped' headers for the US E46 M3 are a replacement for the stock manifolds/cats and an upgrade from the standard Supersprint headers. This header is a partially stepped design - the tubing diameter increases as it leaves the exhaust port, which helps exhaust flow, but has the factory-sized outlet so it can connect to a factory section 1 exhaust. For making E46 M3 horsepower and performance gains, headers are right at the top of the list (along with changing the rear end gears).
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