Active Autowerke G80/G82 M3/M4 Signature Equal Length mid-pipe**This product is a part of the Active Autowerke Motorsport Collection. It is for RACE and OFF ROAD USE ONLY! Active 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 X Pipe and Single Mid pipe for the G8X. It provides the advantages of an equal length