TRACK ONLY - The Primary Catalyst Bypass Pipe deletes the primary Catalyst from the exhaust system. This part allows the exhaust gases to pass through the system unrestricted by the primary OE Catalyst, increasing the gas-flow and in turn engine efficiency. The Bypass Pipe comes equipped with a Turbo Elbow for fitment in vehicles possessing a turbo. The turbo elbow reduced back pressure allowing the turbo to “Spool” sooner reducing lag and improving throttle response. - Requires Stage 2 ECU Remap. All our performance exhaust systems are designed with you in mind, and we Cater to an ever-expanding range of vehicles. We believe in continuous evolution, and our research & development team work throughout the year to deliver the most in demand solutions to all your performance exhaust requirements. All of our products are made in the UK and distributed to more than 90 countries worldwide, making Milltek Sport one of the most accessible performance aftermarket brands on the market. (8V MQB - Pre Facelift Only)