Stone Exhaust Valved Catback Exhaust System BMW B48 B46 G01 G02 (X3 20i xDrive & X4 20i xDrive)

We are proud to introduce you to the state of the art Stone Exhaust Valvetronic Cat-Back Exhaust System with single valve, to enhance the performance and sound of your BMW G02 SAC X4 20i xDrive with the B48 engine. Stone Exhaust has been developing world's best exhaust system since 1998, starting with 3D scanning and reverse engineering the OEM system, this allows the Stone engineers to design a 100% OEM fitment exhaust with precision. With our in-house dyno, your BMW exhaust system is proven to produce more power with the enhanced Stone signature exhaust sound. The OEM Integrated Valve option allows your exhaust system to operate as standard, where the onboard computer (ECU) will control the opening and closing of the valves automatically.     Features OEM Integration Available to add-on Stone Valvetronic System Plug and Play OBDII controller One Piece Design Mechanical Welding with Precision In House Research and Development 3D Scanning & Reverse Engineering Dyno Developed In