Constructed from high-grade titanium, the link pipe is shorter, allowing the secondary stock catalytic converters to remain on the car. Combined with a Slip-On Line (Titanium) and delivering a deep, rich, and sporty sound without drone, it totally embraces the pure turbocharged inline six-cylinder sound. Remapping is mandatory. This product is meant for racetrack use and closed courses only.This product fits only on NON-OPF vehicles.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.