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Kooks 3-Inch Catted H-Pipe (11-14 GT w/ Long Tube Headers)

Item 398874
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Market Price $788.99 You Save 12% ($91.64)
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$697.35 (kit)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases Airflow to Maximize Power
      • Intimidating Race Car Growl
      • Catted H-Pipe Design
      • Kooks High-Flow Race Catalytic Converters Included
      • 3" Mandrel-Bent Tubing
      • 304 Stainless Steel Fabrication
      • Stainless Steel Finish
      • Intended for Street Use
      • Designed to be Used with Kooks Long Tube Headers
      • Fits 2011-2014 Ford Mustang GT with Long Tube Headers


      Maximize Your Driving Experience. The Kooks 3” Catted H-Pipe is designed to give your Mustang GT more horsepower and torque than any other option on the market. Race and dyno tested, the 3” Catted H-Pipe has proven itself to be a performance enhancement that every muscle car lover needs.

      Get That GT Growl. Every Kooks H-Pipe is designed to satisfy the exact needs of your engine, so you can rest assured that it will be the perfect fit for your Mustang GT, delivering that perfect race car growl you've been searching for. The sound is louder than the typical stock exhaust but doesn't have an obnoxious whine.

      High-Flow Cats Included. With the exhaust, you will also receive the flawless Kooks high-flow race catalytic converters, built with a 400-cell count catalyst for the absolute height of excellence. The Kooks cats are a significant improvement from restrictive, factory cats.

      High-Quality Construction. The Kooks H-Pipe is built from aircraft-quality, mandrel-bent steel. With a classic, stainless steel finish, it will be a sleek addition to your vehicle that won't degrade over time.

      Application. The Kooks Catted H-Pipe is designed for use with any 2011 to 2014 Ford Mustang GT with a 5.0L Coyote engine. Kooks Long Tube Heads are required.

      Important Note. This product is not legal for sale, use, or installation on licensed vehicles in California. This product does not meet CARB compliance.

      Fitment: 2011 2012 2013 2014 Details

      MPN# 11413500

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (5)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 5 customers

      Installation Time: Afternoon

      Installation Cost: $250-$500

      • January 16, 2020

        5 2013 GT - Anonymous Installation Time: Afternoon

        H-pipe Coyote

        Love the hpipe sounds like a beast on my car I turn heads every single day sounds like a machine.

        Helpful (0)
      • July 15, 2019

        5 2013 GT - James Installation Time: Afternoon

        A ruthless upgrade...

        I’ve had this on the car about 3-4 weeks now and it’s definitely an attention grabber. Cold starts and hitting 3-5k rpm on wot will let folks blocks away know you’re coming and since I paired this with flowmaster outlaws. People definitely know you mean business. Although there is one small con or more so a stroke of bad luck I have to look into. Now after 4 weeks of driving on the set up...I have a permanent check engine light for the cats operating below threshold (codes p0420 and p0430) so far this hasn’t caused any drivability concerns. But having to see that orange light while driving is vexing to say the least.

        Helpful (0)
      • December 04, 2018

        5 2014 GT - TripleJ124 Installation Time: Shop Install Installation Cost: $250-$500

        Kooks Catted H Pipe

        I purchased this and the Kooks long tube headers on Cyber Monday, and it was the best decision. I took it to my local shop and they had them installed in a day. The fitment was great and the sound is amazing. Sound at idle or cruising is louder, but not obnoxious, and it roars alive once the gas is pressed. Recommend 11/10

        Helpful (10)
      • October 13, 2018

        5 2013 GT - Henry Installation Time: Afternoon

        Great headers

        Great mid-pipe I paired these with the kooks long tube headers. I already had the Borla atak exhaust. The rumble got deeper and when you hit above 3500 it roars

        Helpful (14)
      • February 06, 2018

        5 2011 GT - paulk Installation Time: Less than 1 Hour

        paw-paw's red candy

        Perfect fit!!! Sounds awesome!!!! Absolutely love it!!!!

        Helpful (13)

      Questions & Answers (9 answers)

      5 Top Rated Questions

      If I purchased a set of Kooks 1 7/8" headers, with this H pipe, will it work with the Roush exhaust system I currently have on my 2011 GT? Thanks for any info you have~

      • Yes, the Kooks headers and H-Pipe will work with the Roush Exhaust.

      Helpful (2)

      My car is running a flow master American thunder catback and is otherwise stock. Will this h pipe and the corresponding kooks long tubes bolt up to my catback system or will I have to modify something?

      Does this give your car a deep growl or race?

      • This will give your vehicle a deep growl and a nice roar when accelerating.

      Helpful (0)

      Will I be able to use my stock headers with this

      • This cannot be used with stock headers.

      Helpful (0)

      I want a deep muscle car rumble will this mid pipe help me achieve that?

      • Yes, the H pipe will be the best choice to achieve the deep muscle car tone. 

      Helpful (0)
      Post Your Question
      4 More Questions
      Will this work with borla ATAK longtube headers? And would it remove a check engine light? 1 answer
      Does this mid pipe come back down to 275 to fit the factory over axle pipes? 1 answer
      Do i need to run a tune after header and h pipe catted or not catted 1 answer
      will these work with Pypes long tube headers 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Catted H-Pipe
      • (2) Catalytic Converters

      Tech Specs

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • GT - 11, 12, 13, 14

      Requires the Use of Kooks Long Tube Headers.

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