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Bring more V8 character to your Mustang GT
Kooks 11312200 gives your 2005-2010 Mustang GT 4.6 a long tube header with 1-3/4-inch primaries and 3-inch collectors. The 16-gauge 304 stainless construction makes a purpose-made starting point for your exhaust upgrade.
SKU: 11312200
Match the gearbox and sensor requirements
The supplied header is the manual-transmission application. It can be used for the automatic installation with two additional CAS-109014 O2 extensions, purchased separately. All header fitting hardware is included. The mandrel-bent primaries retain their shape through the bends, with routing made for the specified installation.
Use the 3-inch-inlet crossover
The 3/8-inch laser-cut round-port flanges use the factory bolt pattern. Add a matching Kooks X-pipe or H-pipe with 3-inch header inlets, then have the system aligned and the wiring clearance checked by your installer.
Tuning for your exhaust upgrade
We recommend tuning with every header installation so the calibration suits your headers, complete exhaust and fuel. Talk to us to discuss tuning for your vehicle and the parts you are fitting.
Matching products
Use the 3-inch-inlet Mustang GT X-pipe for this 2005-2010 GT 4.6 header installation; its 3-inch inlet matches the 11312200 collectors and its 2-1/2-inch outlet connects to the OEM-size rear exhaust.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2005-2010 | Ford Mustang GT | 4.6L V8 | 11312200 | Manual gearbox; automatic fitting requires two separate CAS-109014 extensions; 3-inch-inlet crossover |
| 2007-2008 | Ford Mustang Shelby GT | 4.6L V8 | 11312200 | Manual gearbox; automatic fitting requires two separate CAS-109014 extensions; 3-inch-inlet crossover |
| 2008-2009 | Ford Mustang Bullitt | 4.6L V8 | 11312200 | Manual gearbox; automatic fitting requires two separate CAS-109014 extensions; 3-inch-inlet crossover |
Intended use
11312200: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11312200.
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 |
|---|---|
| SKU | 11312200 |
| Application | 2005-2010 Mustang GT 4.6L 3V; manual |
| Header primary diameter | 1-3/4-inch |
| Collector diameter | 3-inch |
| Construction | 16-gauge tubing |
| Flanges | 3/8-inch laser-cut; round ports; factory bolt pattern |
| Included | All header fitting hardware |
| Automatic installation | Two extra CAS-109014 O2 extensions required; purchased separately |
| Required exhaust parts | Matching Kooks X-pipe or H-pipe |
| Primary construction | Mandrel-bent primaries |
| Material | 304 stainless steel |
| Configuration | 11312200; Header Size: 1-3/4" x 3"; Transmission Type: Manual |
Frequently asked questions
Can I fit these to an automatic?
Yes, with two additional CAS-109014 O2 extensions purchased separately. The stated automatic fitting condition must be met.
Will the 2-1/2-inch-inlet X-pipe fit?
Choose the matching crossover with 3-inch header inlets for the 11312200 collectors.
