Flowmaster FlowFX Direct Fit Muffler. 2017-19 Ford F-150 Raptor with 3.5L Ecoboost engine. Designed as a direct-fit replacement muffler for 2017-19 Ford F-150 Raptor with 3.5L Ecoboost engine. This easy to install muffler delivers a moderate to aggressive interior and exterior sound level that will appeal to anyone looking for a deep powerful exhaust note. Features include all 3.00-inch mandrel-bent stainless steel tubing mated to a specially designed dual 3.00-inch inlet/outlet "straight-through" FlowFX muffler for great sound and maximum performance. Utilizes the factory hanger locations and connections without any cutting or welding and can be installed in less than 30 minutes. Includes all necessary parts, hardware and easy to follow instructions.