3" To 4" Straight Turbo/Intercooler/Intake Piping Coupler Reducer Silicone Hose (Red) 4mm Thickness 3-Ply Nylon for Strong Reinforcement Withstands Operating Temperatures from -65F to 500F Degrees Fahrenheit Working pressure 80 psi / Burst pressure 245 psi Inlet / Outlet: 3" / 4" Universal Application for Connecting Turbo Piping or Intake Piping