This cat-back exhaust system is constructed of 3 IN - 2-1/2 IN mandrel-bent brushed finished 304 stainless steel tubing for maximum strength and durability. This system features a high-flow 304 stainless steel muffler, producing a deep sound. Finishing off this exhaust system are dual 4-1/2 IN diameter carbon fiber 304 stainless steel clamp-on exhaust tips. The tips features an aFe POWER logo for a unique style. This system produces a deep sound unleashing all available horsepower and torque. This kit includes 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. This system features an electronically controlled exhaust cutout valve to quickly switch between exhaust tones at the push of a button. A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response. State-of-the-art computer-aided design technology is utilized for precise vehicle fitment. 100% TIG-Welded for race-proven strength and durability. Gemini XV 3 to 2-1/2 IN 304 Stainless Steel Cat-Back Exhaust w/ Cut-Out Carbon Toyota GR Corolla 23-24 L3-1.6L (t) Toyota GR Corolla 23-24 L3-1.6L (t)