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Kooks 3 Inch Green Catted Y-Pipe (14-18 5.3L Sierra 1500 w/ Long Tube Headers)

Item S500731
AmericanTrucks no longer carries the Kooks 3 Inch Green Catted Y-Pipe (14-18 5.3L Sierra 1500 w/ Long Tube Headers). Please check out 2019-2021 GMC Sierra Mid-Pipes for an updated selection.
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    Product Information

    Features, Description, Q&A, Specs & Installation


    • Horsepower and Torque Gains
    • Adds Aggressive Note to Exhaust
    • Mandrel Bent 16-Gauge Stainless Steel Tubing
    • 3” Inlet with OEM Outlet
    • Kooks EPA Certified Green Catalytic Converters
    • Not California Street Legal
    • Requires Kooks Long Tube Headers
    • OEM Outlet for Use with Stock Exhaust
    • Fits 2014-2018 5.3L V8 GMC Sierra Models


    Performance Gains. If you want to increase your 5.3L Sierra's horsepower and torque, look no further than the Kooks 3-inch Green Catted Y-Pipe. Adding this Kooks Y-Pipe with the required Kooks Long Tube Headers to your truck will boost overall performance, thanks to the Y-Pipe's 49-state EPA certified green catalytic converters.

    Bold Sound. Once installed, the Kooks Green Catted Y-Pipe with 3-inch inlet provides an aggressive note to the stock exhaust. This clear sound results from the pipe's "Y" crossover style. There's nothing like speeding down the road with a nice loud sound in your wake.

    Top Quality Materials. This product is constructed of mandrel bent 16-gauge stainless steel tubing, with a "Y" design for high stability and better exhaust flow. The pipe weighs 29 lbs. and has an OEM outlet that connects the matching Kooks Long Tube Headers to the stock cat-back exhaust. Follow the included installation guide for proper fitment.

    Application. The Kooks 3-inch Green Catted Y-Pipe is made for 2014 to 2018 5.3L V8 GMC Sierras, and it must be used with the corresponding Kooks Long Tube Headers (sold separately). It is not California street-legal.


    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Catted Y-Pipe

    Questions & Answers

    10 More Questions

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