Tomioka Racing Silicone Reducer Hose features 5-ply reinforced high temperature material. TR Silicon Reducing Coupler Hoses are used by professionals in high performance applications. The hoses are highly useful for transitioning between different sized intercooler, turbo, and intake components and pipes. The silicon hoses comes with lifetime warranty for y our peace of mind. Transition size 3-inch to 2.25-inch.