Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Every day 8:30AM EST - 11:00PM EST
Win 1 of 3 Exhaust Kits! Enter Daily!

Kooks Stage 8 Locking Header Bolts (11-14 GT)

Market Price $65.99 You Save 13% ($8.65)
Starting At

$57.34 (kit)

FREE Shipping

  • Item 399811
  • MPN# BK105

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Will this fit your Vehicle?

In Stock Ships same business day.
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

    • Locking Exhaust Header Bolt Kit
    • Outstanding Exhaust Header Security
    • Bolts Lock in Place
    • Can’t Back Out
    • Stops Leakage
    • Avoids Blown Header Gaskets
    • All Locking Hardware Included
    • For 5.0 Ford Coyote Engines
    • Manufacturer’s Lifetime Warranty
    • Fits Ford Mustang GTs from 2011–2014
    Outstanding Exhaust Header Security. Ordinary exhaust header bolts might be okay for ordinary engine applications but if you’re running serious power from the Coyote 5.0 V8 engine in your Mustang GT and are under big pressure, you just can’t afford for an exhaust header bolt to back out. Avoid the risk of leakage or a blown exhaust header gasket by installing a set of premium Stage 8 Locking Header Bolts from Kooks. The kit includes everything you need and your Mustang will definitely thank you with the boost in reliable performance.

    4130 Alloy Grade-8 Steel. These Stage 8 Locking Exhaust Header Bolts are constructed out of aircraft-quality grade-8 4130 alloy steel and finished with duplex nickel plating. The Stage 8 patented 3-piece system uses a grooved bolt, a retainer piece and a spring clip. When the bolt is securely in place, the retainer fits over the bolt head and secures up against the exhaust header, the clip snapping firmly in the groove to make a secure fit that won’t jiggle loose. From materials to design and engineering, your Mustang’s exhaust headers enjoy a security of fastening that cannot be beat.

    Lifetime Manufacturer’s Warranty. Stage 8 Locking Header Bolts are covered by a lifetime manufacturer’s warranty.

    Application. The Stage 8 Locking Header Bolt Kit fits the 5.0 Coyote V8 engine in all Mustang GTs from 2011 to 2014.

    Fitment: 2011 2012 2013 2014 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (16) Locking Exhaust Header Bolt
    • Locking hardware
    Installation Info
    Tech Specs
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos

    Q & A

    No questions about this product yet.

    Ask the First Question

    People Who Bought This Item Also Bought

    Customer Reviews (1) Write a Review

    Overall Rating 5

    out of 5 stars

    • 5/5

      March 09, 2018

      Best on the market

      These are pretty great header bolts pretty simple install the headers on the other hand not so much but I would highly recommend these to replace the stock studs


      Year: 2014 Submodel: GT

      Helpful (3)

    Related Mustang Categories