4" I.D. TO 3" I.D. Silicone Hose (45 Degree Angled Elbow Coupler). 4 layer polyester reinforced High temperature silicone hose. Silicone is resistant to electrochemical degradation, however, are not suitable for use with oil or fuel.
For 45 degree 4"ID to 3"ID turbocharger intake Black Elbow Slicone
EMUSA 5SET Universal BLUE 4PLY 90 Degree 3"ID to 3"ID Silicone+ 2xSS Clamp
Steel Adaptor for Turbo T3 4 Bolts to 3" ID V Band Flange
4" To 3.75'' ID Straight Reducer Silicone Hose Turbo Intake Coupler Pipe Black
US SHIP 4" To 3.25'' ID Silicone Hose Reducer Straight Coupler Pipe Turbo Black
90 Degree 4" To 3" (102-76mm) ID Silicone Reducer Coupler Turbo Hose Pipe Black