This system produced gains of up to +14 HP and +17 lbs. x Ft. TQ., as measured on our in-house dyno. This cat-back exhaust system is constructed of 3" mandrel-bent 304 stainless steel tubing for maximum strength and durability. This system features a high-flow stainless steel, producing an aggressive sound. Muffler finish may vary. Finishing off this exhaust system are dual 4-1/2" diameter black 304 stainless steel clamp-on exhaust tips. The tips feature an aFe POWER logo plate riveted on for a unique style. Gemini XV exhaust features an electronically controlled exhaust cutout valve to quickly switch between mild and aggressive tones at the push of a button. This kit includes two key fob remotes, control module, valve motor, and all necessary wiring. It's a simple installation, requiring no cutting of any wires or interference of the automobile's electronics. Utilizing factory style hangers this system is a direct bolt-on system, which requires no cutting or modifications for a hassle-free installation. Utilizing state-of-the-art computer-aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. 100% MIG-Welded for race-proven strength and durability. Gemini XV 3 IN 304 Stainless Steel Cat-Back Exhaust System w/ Cut-Out Black GM Trucks 09-18 V6-4.3/V8-4.8/5.3L GM Trucks 09-18 V6-4.3/V8-4.8/5.3L