Know the landed cost before you order
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Enjoy more of your automatic Mustang GT
Your 4.6-litre Mustang can have a purpose-made header upgrade for its automatic installation. Kooks 11312010 uses 1-5/8-inch primaries and 2-1/2-inch collectors, with 16-gauge 304 stainless construction.
SKU: 11312010
The right header for the gearbox
This is the automatic-transmission version for the 2005-2010 GT 4.6 3V. The 3/8-inch laser-cut round-port flanges use the factory bolt pattern, and all header fitting hardware is included. The mandrel-bent primaries retain their shape through the bends, with routing made for the specified installation.
Choose the matching crossover inlet
Use a Kooks X-pipe or H-pipe with 2-1/2-inch header inlets. Professional fitting can involve supporting the engine and gaining access around the K-member and steering shaft, so plan the installation and calibration together.
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
The Mustang GT X-pipe is for the 2005-2010 GT 4.6 header installation; select the variant with 2-1/2-inch header inlets to match 11312010.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2005-2010 | Ford Mustang GT | 4.6L V8 | 11312010 | Automatic gearbox; matching Kooks X-pipe / H-pipe with 2-1/2-inch inlets |
| 2007-2008 | Ford Mustang Shelby GT | 4.6L V8 | 11312010 | Automatic gearbox; matching Kooks X-pipe / H-pipe with 2-1/2-inch inlets |
Intended use
11312010: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11312010.
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 | 11312010 |
| Application | 2005-2010 Mustang GT 4.6L 3V; automatic |
| Header primary diameter | 1-5/8-inch |
| Collector diameter | 2-1/2-inch |
| Construction | 16-gauge tubing |
| Flanges | 3/8-inch laser-cut; round ports; factory bolt pattern |
| Included | All header fitting hardware |
| Required exhaust parts | Kooks X-pipe or H-pipe with 2-1/2-inch header inlets |
| Primary construction | Mandrel-bent primaries |
| Material | 304 stainless steel |
| Configuration | 11312010; Header Size: 1-5/8" x 2-1/2"; Transmission Type: Automatic |
Frequently asked questions
Is this the manual-transmission header?
11312010 is the automatic version. The manual 1-5/8-inch product is 11312000.
What inlet size does the crossover need?
The matching X-pipe or H-pipe needs 2-1/2-inch header inlets.
