Active Autowerke X3M / X4M Signature Equal Length midpipe level 2 Very useful tool if one

Very useful tool if one requires any additional software upgrades or revisions that may be needed in the near future

Our Carbon Fiber tips have a genuine plain-weave carbon sleeve that is riveted to our black chrome base that provides an elegant

detailed remapping to the entire DME we have been able to increase your S54's output by 14 HP and 11 ft lbs of torque on a stock BMW E46 M3 with factory settings for a normal street car

The Active Autowerke race only exhaust system is constructed of 100% 304 brushed stainless steel and has a industry standard warranty against rust

Active Autowerke X3M / X4M Signature Equal Length midpipe level 2 Very useful tool if oneAfter extensive research and development, ACTIVE AUTOWERKE has announced GEN 2 of our EL midpipes. We worked with our factories to create specially developed RESONATORS that remove rasp from the exhaust tones with minimal change in the volume of the sound. A side benefit is that this also resulted in a reduction in the "2k buzzing" annoying to some BMW owners as well as a reduction in the cold start rattle from the factory. We are recommending to