Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 From Rovos! Enter daily!

Kooks 1-5/8 in. x 3 in. Stainless Steel Long Tube Headers (11-14 GT)

Market Price $1,251.99 You Save 12% ($145.43)
Our Price

$1,106.56 (each)

FREE Shipping

  • Item 398870

Will this fit your Vehicle?

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

    • Exudes an Aggressive Exhaust Note
    • Increased Exhaust Flow for a Revved-Up Horsepower and Torque Gains
    • Built Using High-Quality, Aerospace-Grade 304 Stainless Steel
    • Mandrel-Bent 1-7/8" Tubular Design
    • High-Performance Chrome Polish Enhances Resistance to Corrosion
    • Direct Fit Replacement Exhaust Accessory
    • Must be Used with Kooks H-Pipe or Y-Pipe Cat-Back for Optimum Performance
    • Not CARB Certified – Utility, Sale or Installation in a Licensed Vehicle is Illegal in California
    • Backed Up by a Limited Lifetime Warranty
    • Engineered to Fit 2011-2014  Ford Mustang GT Models
    Hopped- Up Performance and Horsepower. These LTHs by Kooks are crafted with an integrated venturi style collection tube that heightens exhaust scavenging while reducing gas turbulence for a smooth flow. That boosts the horsepower and torque coefficients.

    Improved Exhaust Note. With an increased exhaust flow, the more the sound. Simply put, unlike the stock manifolds, the Kooks Stainless Steel Long Tube Headers. With a supercharger as a Mustang motor, these headers get louder when the baffles open. The effect? You get a consistent crisp roar whenever you step on the go pedal.

    Quality Construction. Proudly in U.S, the production of this Kooks header meets the required quality threshold. It utilizes high-quality 1-5/8" mandrel-bent 304-grade stainless steel tubing for an accelerated gas flow. The header is TIG welded to render it leak-free. It is polished surface makes the steel highly resistant to rust.

    Quick, Bolt-On Installation. Methodically designed, the Kooks Stainless Steel LTHs are direct replacement upgrade for OE manifolds. They are easily installed through bolting but perform optimally with H-Pipes and Y-Pipes.

    Warranty. Kooks backs the quality of their Kooks 1-5/8" SS LTHs by a Limited Lifetime Warranty. Nonetheless, valid to the original product consumer.

    Application. The Kooks 1-5/8 in. x 3-inch Stainless Steel Long Tube Headers fits 2011-2014 Ford Mustang GT models.

    Fitment: 2011 2012 2013 2014 Details

    MPN# 11412000

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) 1-5/8" SS Long Tube Headers
    • Installation Hardware
    Installation Info
    Tech Specs
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos

    More Products You Might Like

    Q & A

    No questions about this product yet.

    Ask the First Question

    Recommended For You

    Customer Reviews (1) Write a Review

    Overall Rating 4

    out of 5 stars

    Installation Time:Shop Install

    • Loudness / Volume 5 5
    • Exhaust Note 5 5
    • Fit & Finish 5 5
    • Bang For Your Buck 4 4

    • 4/5

      Installation Time: Shop Install

      April 11, 2018

      Long tubes

      Good with the off road xpipe. It's loud and u can tell the difference.


      Year: 2011 Submodel: GT

      Helpful (3)

    Related Mustang Categories