DNA Motoring CBE-VWGOLF99 CBEVWGOLF99 Stainless Steel Catback Exhaust System Made of high quality T-304 Stainless Steel. TIG welded CNC machine flange for resistance against pressure and corrosion. Aggressive deep and smooth tone sound while ensures smooth exhaust gas flow. Increase engine output and efficiency. Dyno proven to instantly increases 15 to 25 horsepower or low end torque Color: Chrome Surface Finish: Polished T-304 Stainless Steel Exhaust Inlet / Outlet Diameter: Catback: 3&#034; Inlet Tip Diameter (IN): 3&#034; Tip Type: Rounded Tip 99-05 Volkswagen Golf Mk4 99-05 Volkswagen Jetta A4 Typ 1J Made of High Quality T-304 Stainless Steel with Computerized Mandrel-Bends for Strength and Durability Gaskets and Hardware Included Notes: Installation instruction is not included. Professional installer is highly recommended There are a few benefits that come from using an exhaust cat back system, such as increased horsepower and fuel efficiency, as well as, an aggressive sound and stunning aesthetic. But to fully grasp these benefits we first must understand the engines combustion cycle. Increase in horsepower, torque, and MPG Louder, more aggressive tone Stylish appearance Quality Materials Our professional technicians do heavy research and development in testing car applications and fitments for our products. We also do rigorous testing on the strength, durability, as well as longevity of the material in order to make sure when the product arrives at the consumers end that its ready to go without worries.