Active Autowerke G80/G82 M3/M4 Signature Equal Length mid-pipe with G-braceActive Autowerke is proud to release our patented Signature Equal Length Mid Pipe for the BMW G80 M3 and G82 M4. This brings our expertise with developing the first equal length mid pipe from the F8X M cars to the G8X M cars and is an alternative to our Single Mid pipe for the G8X. It provides the advantages of an equal length exhaust system with a smoother high rev sound. BMW provided an equal length solution with the crossover pipe from the short