For Ford Mustang 3-Ply Silicone Radiator Coolant Hose (Red) - 4th Gen The"New Edge" 3-Ply (4mm) Nylon for Strong Reinforcement Increases Engine Performance and Efficiency and Helps to Keep Engine Bay Temperatures Cooler Withstands Operating Temperatures up to 330F Degrees Fahrenheit Main Hose Inlet/Outlet Inner Diameter: 1.375"/1.375" / 3-Way Split Hose Inlet/Outlet: 1.5"/1.625"/1" / Size (Diameter) Tolerance: +/- 0.225" Work With Factory or Aftermarket Radiators