aFe 49 38059 Mach Force XP 304 SS Cat Back Exhaust System with aFe 49 33139 B Mach Force XP 304 SS Cat Back Exhaust System with aFe MACH Force Xp 3" 304 Stainless Steel Cat Back Exhaust (Muffler Del aFe 49 32071 Mach Force XP 304 SS Cat Back Exhaust System with. This system produced gains of up to +7 HP and +5 lbs. x Ft. TQ., as measured on our in house dyno. This cat back exhaust system is constructed of 3" 2 1 2" mandrel bent brushed finished 304 stainless steel tubing for maximum strength and durability. This system produces an aggressive sound unleashing all available horsepower and torque. Finishing off this exhaust system are quad 4 1 2" diameter carbon fiber stainless steel clamp on exhaust tips. The tips features an aFe POWER logo for a unique style. Utilizing factory style flanges and hangers this system is a direct bolt on system, which requires no cutting or modifications for a hassle free installation. This cat back exhaust system uses a heavy duty flex pipe with an internal interlock liner for added strength and durability. A mitered merge x pipe is used to balance and evenly distribute exhaust pulses traveling through the exhaust system, minimizing exhaust drone and maximizing scavenging. This axle back exhaust system incorporates factory style NPP dual mode & AFM (active fuel management) exhaust valves which use the factory exhaust valve motors (not included). The valves helps regulate, direct and control the flow of exhaust gases by opening, closing, or partially obstructing passageways depending on throttle position for maximum performance. Utilizing state of the art computer aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. 100% TIG Welded for race proven strength and durability. This Part Fits: Year Make Model Submodel 2020 2022 Chevrolet Corvette Stingray