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.
Choose the front exhaust for your two-valve Mustang
Upgrade your 4.6-litre GT with Kooks long tube headers and the fitting arrangement your build needs. Choose 1-5/8" primaries with a 2-1/2" collector and EGR fitting, or 1-3/4" primaries with a 3" collector and no EGR fitting.
SKUs: 11212000, 11212200
The size changes the required X-pipe
11212000 needs the 2-1/2"-inlet Kooks X-pipe. 11212200 needs the 3"-inlet version. Match that collector connection when ordering the crossover.
Stainless construction and fitting hardware
Both choices use 16-gauge 304 stainless steel, round ports, the stock bolt pattern and 3/8" laser-cut flanges. Installation hardware is included.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 11212000 | Header Size: 1-5/8" x 2-1/2" | 1-5/8" primaries, 2-1/2" collectors; EGR fitting included. | Match the vehicle and engine rows below |
| 11212200 | Header Size: 1-3/4" x 3" | 1-3/4" primaries, 3" collectors; EGR fitting not 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
For the 1999-2004 GT 2V using 11212200 headers, the New Edge OEM-outlet X-pipe has the required 3-inch inlet and 2-1/2-inch OEM outlet. This link is for the later New Edge subset.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 1996-2004 | Ford Mustang GT | 4.6L V8 | 11212000, 11212200 | |
| 2001 | Ford Mustang GT Bullitt | 4.6L V8 | 11212000, 11212200 |
Intended use
11212000, 11212200: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11212000, 11212200.
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 | 11212000, 11212200 |
| Application | 1996-2004 Mustang GT 4.6L 2V |
| Material | 16-gauge 304 stainless steel |
| 11212000 | 1-5/8" primaries, 2-1/2" collectors; EGR included |
| 11212200 | 1-3/4" primaries, 3" collectors; EGR not included |
| Head interface | Round ports; stock bolt pattern; 3/8" laser-cut flanges |
| Required crossover | Matching Kooks X-pipe; collector-size inlet |
| Fitting parts | Installation hardware included |
Frequently asked questions
Which option includes EGR?
11212000, with 1-5/8" primaries and 2-1/2" collectors.
Are these the four-valve Cobra headers?
This range is for the two-valve Mustang GT 4.6.
