Your GTI is turbocharged and has factory performance which is a real surprise. BORLA® often touts its racing heritage, and the Volkswagen Company has a great racing heritage. Some may not know that the Audi and Bentley that dominated LeMans are Volkswagen companies. The BORLA® Cat-Back™ System (PN140248) uses 2½" tubing and straight performance mufflers suitable for 2-4 door models. This BORLA® system delivers great power and great sound that sounds like some of the classic cars. high-end European luxuries that cost more than double Weighing 30% less than the factory system, this sleek BORLA® exhaust is completed with a pair of fully polished 3.15 round T-304 stainless steel tips. inches. The Volkswagen GTI is great value, and a quality BORLA® exhaust makes it even better. BORLA®, the original pioneers of high-grade T-304 austenitic stainless steel free-flowing exhaust (superior 409 or aluminized steel) uses award-winning, patented technology to deliver quality, sound, performance gains and improved fuel economy - all with easy bolt-on installation. Just to show that BORLA® believes in its products, they back every street system with an unmatched million mile written warranty.