Active Autowerke G80/G82 M3/M4 Gen 2 Signature Equal Length mid-pipe (US Patent 11248511, UK and EU patent 3882441) n55 NOTE: Dyno chart for M340

NOTE: Dyno chart for M340 shows stock with AA B58 Catted Downpipe

If you have an Alpha N

year-2012-make-bmw-model-335is

all-new SIMON 4

Use the GREEN FiIter Cleaning KIT to help restore the life in your old GREEN filter

Active Autowerke G80/G82 M3/M4 Gen 2 Signature Equal Length mid-pipe (US Patent 11248511, UK and EU patent 3882441) n55 NOTE: Dyno chart for M340After 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