Upgrading a vehicle's exhaust system is a great way to build horsepower, free up trapped torque, and improve upon restrictive factory systems. The larger pipes, low-restriction mufflers, and tuned resonators of a well-designed performance exhaust system can make a world of difference on your vehicle. The net result is lower auto exhaust back pressure, more horsepower, more torque, and a much better sound. Package Included: 1 x Catback Exhaust This product is compatible with: 97-04 Chevy Corvette V8 5.7L This catback is compatible with 97-04 Chevy Corvette V8 5.7L. It is high performance racing spec. design, i.e. maximizing smoothest high exhaust air flow rate. Dyno proven to instantly increases 20 -25 horsepower or low end torque; It also can increase engine output and efficiency Made of high quality T-304 stainless steel with computerized mandrel-bends for strength and durability; TIG welded CNC machine flange for resistance against pressure and corrosion Easy to intall, direct bolt-on. No drilling or modifications needed for installation. Gaskets and hardware are Included Muffler Tip Type: Quad Oval Muffler Tips | Muffler Exhaust Tip Diameter: 4.25" x 3" Oval | Inlet / Outlet Size: 2.5" / 2"