Valved Sport Cat-Back Exhaust System

The Valvetronic Designs Valved Sport Cat-Back Exhaust System is engineered to restore the drama and engaging tone of the BMW S63 twin-turbo V8, while maintaining genuine GT composure. This system connects to OEM or aftermarket downpipes and features 3.0-inch mandrel-bent tubing throughout for reduced back pressure and sharpened throttle response. The integrated large X-pipe crossover enhances scavenging, contributing to improved mid-range punch and a cleaner, more harmonized exhaust note. Control over the exhaust's sound is achieved through vacuum-actuated valves that offer dual-character performance. With the valves closed, the system provides a refined, near-OEM volume suitable for daily driving and highway cruising. Opening the valves unleashes a deep, assertive V8 character with a motorsport edge. An included key fob controller seamlessly integrates with the factory harness for reliable, on-demand sound management. Constructed from T304 stainless steel, this system offers a weight savings of -21.7 lb compared to the OEM exhaust. It features precision TIG welds and smooth, high-flow routing. The system is a direct bolt-on installation and is 100% reversible, allowing a return to stock configuration at any time. It is specifically designed for the BMW F10 M5 (2011-2016) and F06 M6 Gran Coupe (2013-2018) with the S63 4.4L V8 TT engine. Important Note: This item and any similar items are not CARB approved and therefore not for sale in the state of California or other states that require CARB certification. Please check with your local enforcement officials regarding the legality of use in your place of residence.