The GTI is turbocharged and has factory performance that is a real surprise. BORLA often touts their racing heritage, and the Volkswagen Company has a grand racing legacy. Some may be unaware that the Audi and Bentley, who have dominated Le Mans, are Volkswagen companies. The BORLA Cat-Back (PN140248) system utilizes 2?? tubing and straight-through performance mufflers fitting both the 2 and 4 door models. This BORLA system makes nice power and has a great sound that resembles some of the high-end Euro luxury cars costing better than double. Weighing in at 30% less than the factory system, this slick BORLA exhaust is completed with a pair of 3.15? round fully polished tips. The VW GTi is a great bang for the buck, and a quality BORLA Exhaust just makes it better. BORLA, the original pioneers of high quality, T-304 stainless steel (superior to 409 or aluminized steel) free-flow exhaust utilizes patented award and race winning technology to deliver quality, sound, performance gains and enhanced fuel economy ? all with an easy bolt-on installation. Just to show BORLA believes in their products, they back every street system with an unsurpassed written million-mile warranty.