Squirrelly 2.5" to 2.0 inch 90 Degree Elbow Silicone Coupler Reducer Hose Intercooler Piping (Black) Squirrelly's line of silicone couplers feature 3 layers of polyester reinforcement and are suitable for applications with boost pressures up to 45psi. Size: 2.5" to 2" Leg Length: 3.5" Material: 3-ply Polyester Reinforced Temp: 428 Degrees F (220 C)