Performance Gains: This system produced gains of up to +28 HP and +32 lbs. x Ft. TQ., as measured on our in-house dyno. 3" 304 Stainless Steel Construction: This system is constructed of 3" mandrel-bent brushed finished 304 stainless steel tubing for maximum strength and durability. High Flow Catalytic Converter: Includes a high flow catalytic converter which is less restrictive than the factory converter providing maximum flow. V-Band Connection: Stainless steel machined flanges and v-band clamps provide simple to install, leak-free joints. Optional resonator P/N 49M10006 is available for a more smooth tone. Heavy Duty Flanges: Factory style laser cut machined 304 stainless steel flanges are used used for a secure leak-free seal. Installation: Utilizing factory style hangers and flanges this system is designed to fit in the stock locations with no cutting or modifications required for a hassle-free installation. Computer-Aided Design: Utilizing state-of-the-art computer-aided design technology, this system is designed for custom, high tolerance factory fitment. TIG-Welded: 100% TIG-welded for race proven strength and durability. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility. Twisted Steel 304 Stainless Steel Street Series Down Pipe Volkswagen GTI (MKVII) 15-17 L4-2.0L (t) Volkswagen GTI (MKVII) 15-17 L4-2.0L (t)