Long tube 1 5/8" headers. For off-road use only. This product is not emissions legal. Installation requires modification to exhaust system. 3/8" thick laser-cut flanges. 409 stainless steel mandrel-bent primary tubing. Patented JBA Firecone® collector. High quality hardware included. Limited lifetime warranty. Powerful exhaust note. Increased horsepower and torque throughout RPM. Improved throttle response. Improved engine compartment aesthetics.