Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your Mustang! Enter Daily
Win An Eibach Sportline Kit! Enter Daily

Kooks GREEN Catted 3 in. to 2.75 in. X-Pipe (11-14 GT500 w/ Long Tube Headers)

Market Price $1,377.90 You Save 12% ($158.50)
Our Price


FREE Shipping

  • Item 390879

Will this fit your Vehicle?

Change Vehicle Help?
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • 3" Durable Stainless Steel Construction
    • Kooks High-Flow GREEN Cats
    • Connects to 2-3/4" Factory Exhaust
    • Performance, Deep Tone and EPA Certified
    • Works on Applications up to 800 horsepower
    • Withstands Temperatures up to 1500 Degrees
    • Fits 2011-2014 Shelby GT500 Mustangs w/ Kooks Long Tube Headers
    Let The Beast Out. Your GT500 is already a formidable performance machine. Let it reach its true potential with a Kooks GREEN cat X-pipe. Used along with the required Kooks long-tube headers, this combination serves up massive increases in horsepower and torque, and a sound that will make you forget to turn on the stereo.

    Green Catalytic Converters. GreenCats are Kooks ultra high performance green catalytic converters. Kooks specifically designed these Catalytic Converters to meet stringent EPA Federal Emissions Standards. Able to handle exhaust temperatures of up to 1500F, these GreenCats work exceptionally well on both force inducted and naturally aspirated Mustangs. GreenCats have a 90% success rate of eliminating emission related "Check Engine Light" issues.

    Built to Last While Going Fast. High-quality T304 stainless steel is mandrel-bent by Kooks to make the smoothest exhaust path possible. This X-Pipe allows you to retain the stock 2 ¾" tailpipe and muffler on your GT500. This X-Pipe is made in the USA and covered under Kook's limited lifetime warranty.

    Easy, Bolt-On Installation. The Kooks GREEN Catted X-Pipe is a bolt-on application that does not require welding, cutting or drilling. The X-Pipe bolts up to Kooks 3" Long Tube Headers clamping to the existing 2-3/4" OEM exhaust system. All of the required mounting hardware is provided.

    Application. This Kooks Green Cat Catted X-Pipe with is specifically designed to fit the 2011 to 2014 Shelby GT500 Mustangs equipped with the supercharged 5.4L/5.8L V8 engine. This X-Pipe is intended to be installed with 3" Kooks Long Tube Headers.

    Technical Note. This product is

    not legal for use in California or any other state adopting California emission standards. Not legal for use on pollution controlled motor vehicles; intended for off road use only. These Headers are intended for left hand drive applications only.

    Fitment: 2011 2012 2013 2014 Details

    MPN# 11423300

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Catted X-Pipe Assembly
    Installation Info
    Tech Specs
    Mid Pipe Specifications
    Style Mid Pipe: Shorty "X" Type Headers Required: Long Tube
    Piping Material: 304 Stainless Steel Piping Size: 3"
    Catalytic Converter: "Yes" Fitment: 2011-2014 GT500 Mustangs
    Will it fit my Mustang?

      Customer Photos

        Q & A

        No questions about this product yet.

        Ask the First Question


          Related Mustang Categories