Know the landed cost before you order
Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.
Make the headers part of your Shelby upgrade
Start the exhaust upgrade at the engine of your supercharged GT500. These Kooks long tube headers offer 1-3/4" or 1-7/8" primaries, with 3" collectors and the fitting parts for a matched X-pipe or H-pipe installation.
SKUs: 11422200, 11422400
Choose the primary size for your engine
Both sizes use 304 stainless steel, oval ports, the stock bolt pattern and 3/8" laser-cut flanges. The EGR fitting is included on both configurations.
Installation parts already included
PY-8034-AL gaskets, two CAS-109203 O2 extension harnesses and BK111 / BK114 bolt kits are included. Add the matching Kooks X-pipe or H-pipe to complete the front exhaust.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 11422200 | Header Size: 1-3/4" | 1-3/4" primaries, 3" collectors; EGR fitting and listed installation parts included. | Match the vehicle and engine rows below |
| 11422400 | Header Size: 1-7/8" | 1-7/8" primaries, 3" collectors; EGR fitting and listed installation parts included. | Match the vehicle and engine rows below |
Tuning for your exhaust upgrade
We recommend tuning with every header installation so the calibration suits your new headers, complete exhaust and fuel. Talk to us to discuss the right tuning route for your vehicle.
Matching products
The GT500 GREEN X-pipe connects these 2011-2014 GT500 headers to the 2-3/4-inch OEM rear interface. The GT500 GREEN H-pipe is the alternative H-pipe layout for the same GT500 years and OEM rear outlet.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2011-2012 | Ford Mustang Shelby GT500 | 5.4L V8 | 11422200, 11422400 | |
| 2013-2014 | Ford Mustang Shelby GT500 | 5.8L V8 | 11422200, 11422400 |
Intended use
11422200, 11422400: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11422200, 11422400.
Ordering and delivery
Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.
Technical specifications
| Specification | Details |
|---|---|
| SKUs | 11422200, 11422400 |
| Application | 2011-2012 GT500 5.4L; 2013-2014 GT500 5.8L |
| Material | 304 stainless steel |
| Primaries | 11422200: 1-3/4"; 11422400: 1-7/8" |
| Collectors | 3" |
| Flanges / ports | 3/8" laser-cut; oval port; stock bolt pattern |
| Fitting parts | EGR fitting; PY-8034-AL gaskets; 2 CAS-109203 harnesses; BK111 / BK114 kits |
| Required connections | Matching Kooks X-pipe or H-pipe, separate |
Frequently asked questions
Is the crossover included?
The headers need a separately purchased matching Kooks X-pipe or H-pipe.
Do both choices include O2 extensions?
Yes. Both include the two CAS-109203 extension harnesses and the listed fitting parts.
