Evolution Link Pipe Set (Titanium) was tested and developed must be mounted together with the Slip-On or the Evolution Line (Titanium) system. The Evolution link pipe set upgrades the Slip-On system to the Evolution system. The Evolution link pipe set is constructed from high-quality austenitic stainless steel. It features an arrangement of two central link pipes for the best flow of the exhaust gases from the engine. It is designed to increase power and torque and reduce overall weight, while delivering a deep and sporty sound with no unwanted drone or streaming. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE. This evolution link pipe set does not fit on vehicles equipped with Otto particulate filter (OPF).