Flowmaster Flow FX Direct Fit Dual Mode Muffler with Active Valve LB7 Duramax They have been extrude honed

They have been extrude honed to develop 120 extra hp

Thoroughly Remanufactured and Pressure Tested - Crack-checked

The Phat Shaft turbo also has the overall volume for overall torque for efficient full throttle power

00 will be added at checkout

Each strut also features a silver powder coat finish for a rugged style and durable performance

Flowmaster Flow FX Direct Fit Dual Mode Muffler with Active Valve LB7 Duramax They have been extrude honedIntroducing the new Flow FX Active Dual mode muffler featuring our new W. A. V. E. Technology (Wireless Active Valve Exhaust) for all 2019 2026 GM Silverado Sierra 1500 (new body style) with 5. 3L engine. This direct fit replacement muffler has split personalities with a nice performance tone over the stock exhaust system, thanks to the Flowmaster Flow FX performance muffler. The system also features a high quality wireless controlled actuator valve