Blue Silicone 350F CAC Reducer Hose, 2.50 x 2.00" ID, 6" L 30005 This size has a 40mm

This size has a 40mm (1 9/16") ID

5" (38mm) ID to connect two tubes of different sizes

The 3-ply reinforcement results in a working pressure rating in excess of 30 psi (135 psi burst pressure) and a 4

This size can conform to gentle bends with a 5

Blue Silicone 350F CAC Reducer Hose, 2.50 x 2.00" ID, 6" L 30005 This size has a 40mmCharge Air Cooler (CAC) hose is specifically designed to handle the higher temperatures and pressures in high performance turbo and supercharged applications. Four layers of polyester reinforcement and 3 reinforcing rings allow operating pressures of 50 psi (199 psi burst pressure) and temperatures up to 350 F (180 C). Note that this temperature rating is best suited to the "cold" (post intercooler) side of the system. This hose is color coded Blue