Silicone Hose, 4.00 x 3 1/2 inch ID Straight Reducer t 25" (57mm) minimum centerline bend

25" (57mm) minimum centerline bend radius

Silicone Rubber Air Duct Hose is popular for brake cooling ducts due to its high temperature capability (maximum 450° F continuous / 500° F intermittent)

5mm wall thickness (113mm / 4 7/16" and 100mm / 3 15/16" OD) and a working pressure rating over 8 psi (42 psi burst pressure)

The 3-ply reinforcement results in a 4mm wall thickness (27mm / 1 1/16" and 24mm / 15/16" OD) and a working pressure rating over 50 psi (250 psi burst pressure)

The 5mm wall thickness results in an 8 1/4" (210mm) OD

Silicone Hose, 4.00 x 3 1/2 inch ID Straight Reducer t 25" (57mm) minimum centerline bendOur silicone hose is built for endurance and performance in custom coolant and intake plumbing applications. Each hose is hand crafted from multiple layers of silicone rubber with polyester reinforcing fabric between the layers. The silicone rubber remains flexible and tough from 50 C to +180 C ( 76 F to 356 F). The outside has a smooth, shiny, "wipe down" finish that is easy to keep clean. These straight reducer hoses are approximately 5 inches long