Active Autowerke Gen 2 Signature Equal Length Mid-Pipe with X-Pipe – BMW G8X M3 / M4After extensive R&D, Active Autowerke proudly introduces the Gen 2 Signature Equal Length Mid Pipe with X Pipe a refined evolution of our patented exhaust technology, now engineered specifically for the BMW G80 M3 and G82 M4. Featuring newly developed resonators, the Gen 2 system eliminates unwanted rasp and drone while maintaining the aggressive tone enthusiasts expect. This update also reduces the infamous 2k rpm buzz and tones down the factory cold