Active Autowerke G80/G82 M3/M4 Signature mid-pipe with X-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 the highly anticipated Signature Mid Pipe with X Pipe for the BMW G80 M3 and G82 M4. While these cars have received rave reviews for their performance, the sound is a muffled one leaving the driver to wonder if they are really driving a BMW M car. In order to solve this, Active Autowerke has created a full