In recent testing this Mach Force XP cat-back exhaust system produced 10 horsepower and 9 lbs. x ft. of torque. This exhaust system is constructed out of mandrel bent 2.50 stainless steel and includes MIG welded hangers and OE style band clamps for a simple leak-free bolt-on installation. A 2.50 high flow resonator is used to keep exhaust drone to a minimum while maintaining a sporty sound. aFe utilizes 3.5 double wall angle cut polished stainless steel dual tips with an aFe laser etched logo which provides an aggressive yet elegant look. . Simple Installation: All systems use factory mounting locations providing stability and hassle-free installation. Leak-Free Seal: High quality band clamps are used for a complete 360 degree sealing surface. 3.5 Polished 304 Stainless Steel Angle Cut Tips: This cat-back exhaust system uses massive 3.5 diameter 304 stainless steel laser etched dual tips. Emissions Disclaimer: This product does not require a CARB EO# All aFe exhaust systems are engineered and manufactured in our Corona California facility. Volkswagen GTI (MKVI) 10-14 I4-2.0L (t).