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Kooks 3 in. Off-Road Y-Pipe (14-18 5.3L Sierra 1500 w/ Long Tube Headers)

AmericanTrucks no longer carries the Kooks 3 in. Off-Road Y-Pipe (14-18 5.3L Sierra 1500 w/ Long Tube Headers). Please check out 2014-2018 Sierra 1500 Exhaust Pipes for an updated selection.

Features & Details

  • Attaches to Stock Exhaust
  • Stainless Steel Construction
  • For use with Kooks Long Tube Headers
  • 3" Diameter Tubing
  • Fits 2014-2018 5.3L GMC Sierra's
Gain a More Power. Your Sierra needs all the power it can get. By installing this Kooks 3 in. Off-Road Y-Pipe, you free up more engine power because more exhaust can escape quickly, especially since the Y-Pipe does not contain catalytic converters.

Smart Design. Fashioned with a 3-inch wide diameter, this pipe offers plenty of space for a fast and high-flow of exhaust. The Y-Pipe is made of stainless steel for rugged durability as well.

Precise Integration. Made for an exact fit on your Sierra, this Y-Pipe hooks up to the stock Cat-back exhaust point of the OEM outlet. It's used only with Kooks Long Tube Headers for high-powered function and a secure fit.

Application. Legal in 49 states excluding California, this Kooks 3 in. Off-Road Y-Pipe is designed to fit on the 2014-2018 5.3L GMC Sierra's equipped with a set of Kooks Long Tube Headers.

Fitment: 2014 2015 2016 2017 2018 Details

MPN# 28603100

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Y-Pipe
Installation Info
Will it fit my Sierra 1500?

    Customer Photos

      Questions & Answers (2)

      2 Top Rated Questions

      does kooks or other brand offer y pipe to connect to stock manifolds? with or without cats ? my stock y pipe has 3 cats . would it help to eliminate 3rd cat ? has o2 sensors in front and behind front 2 cats . or eliminate all 3 cats? 2018 5.3 silverado

      • At this time we do not offer any Y pipes that connect to the stock manifolds. Horsepower gains removing the cats have been shown to be very minimal on stock and lightly modified Silverados, typically netting 2-5hp. Heavily modified and supercharged Silverados due tend to get a much better benefit from cat removal.

      Helpful (1)

      On these y pipes. They do have the spots to put the O2 sensors back in?

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