Flowmaster introduces our Flow FX stainless steel cat-back exhaust system for the 2021-2026 Ford F-150 RCSB trucks with the 2.7, and 5.0-liter engines. Developed in collaboration with Waldoch Craft this system offers a highly custom 304 Stainless Steel Teardrop exit through the bedside in front of the tire. This system uses a Flow FX series muffler for an aggressive to moderate sound level and increased performance. 3.00-inch mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. Max dyno gains of 16 hp and 18 lb-ft at the rear wheels. All of the necessary hardware is included, and factory-mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty.