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4-Inch Air Intake PVC Couplers and Reducers

4" PVC Couplers & Reducers

Spectre’s 4 inch PVC couplers and reducers help you to easily connect air intake components and tubes together. Our PVC couplers and reducers come in red, blue and black so you can match the color of your connections to your vehicle. PVC couplers are not suitable to be installed on pressurized components such as turbocharger or supercharger outlets.

Available Products
  • 9741 COUPLER/REDUCER; 4" TO 3.5" PVC - BLACK
    9741
    COUPLER/REDUCER; 4" TO 3.5" PVC - BLACK
  • 9742 COUPLER/REDUCER; 4" TO 3.5" PVC - RED
    9742
    COUPLER/REDUCER; 4" TO 3.5" PVC - RED
  • 9746 COUPLER/REDUCER; 4" TO 3.5" PVC - BLUE
    9746
    COUPLER/REDUCER; 4" TO 3.5" PVC - BLUE
  • 9761 COUPLER/REDUCER; 4" TO 3" PVC - BLACK
    9761
    COUPLER/REDUCER; 4" TO 3" PVC - BLACK
  • 9762 COUPLER/REDUCER; 4" TO 3" PVC - RED
    9762
    COUPLER/REDUCER; 4" TO 3" PVC - RED
  • 9766 COUPLER/REDUCER; 4" TO 3" PVC - BLUE
    9766
    COUPLER/REDUCER; 4" TO 3" PVC - BLUE
  • 9771 COUPLER; 4" PVC - BLACK
    9771
    COUPLER; 4" PVC - BLACK
  • 9772 COUPLER; 4" PVC - RED
    9772
    COUPLER; 4" PVC - RED
  • 9776 COUPLER; 4" PVC - BLUE
    9776
    COUPLER; 4" PVC - BLUE
  • 9781 COUPLER; 4" ELBOW 90 DEGREE PVC - BLACK
    9781
    COUPLER; 4" ELBOW 90 DEGREE PVC - BLACK
  • 9791 COUPLER; OVAL, 4" ROUND PVC - BLACK
    9791
    COUPLER; OVAL, 4" ROUND PVC - BLACK