The Twist Professional Series Header was designed to produce more horsepower while simultaneously upgrading the look and sound associated with your vehicle. The Professional Series Header is equipped to withstand high levels of heat, making it ideal for Turbos and Superchargers. OEM fitment can be used with stock exhaust and aftermarket exhaust system. Stainless steel construction. Replacement gasket kit included. On average; increase of 9 HP from Stock Setup. Improved, throatier sound from Stock setup.