Stone Exhaust AP528 BMW G30 M550i xDrive (N63R) OEM-Integrated Valved Cat-Back Exhaust System r59 Daily usability retained with a

Daily usability retained with a more controlled

improving packaging and reliability compared with sleeve designs

The result is a bolt on upgrade that integrates cleanly with factory hardware

Lowering capability up to 50 mm - achieve the look and balance you are after

Stone Exhaust AP528 BMW G30 M550i xDrive (N63R) OEM-Integrated Valved Cat-Back Exhaust System r59 Daily usability retained with aStone AP528 for BMW G30 M550i xDrive N63R Valve Controlled Cat Back Exhaust Unlock a deeper V8 soundtrack and sharper response on your G30 5 Series M550i xDrive with the Stone AP528 valve controlled cat back. This system retains factory electronic flap functionality for quiet cruising and an aggressive tone on throttle, giving you the best of both worlds for daily use and spirited driving. We have installed Stone systems on customer cars and our own