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Make your Coyote Mustang sound and feel more like your car
Upgrade the front exhaust on your 2011-2014 Mustang GT with Kooks 1-7/8" long tube headers and a matching crossover. Choose Performance cats with an X-pipe, or GREEN cats with an X-pipe or H-pipe, while keeping the 2-3/4" OEM rear exhaust interface.
SKUs: 1141H420, 1141H430, 1141H460
Choose the crossover character
The X-pipe merges the exhaust streams, while the H-pipe uses a balance connection between the banks. An X generally gives a smoother, higher-pitched character; an H generally favours a deeper tone. Your rear silencers remain a large part of the sound you hear.
Match the cats to your engine
The Performance-catted X-pipe is for a naturally aspirated setup. The GREEN X and H choices support forced induction. All three packages have 1-7/8" primaries and 3" collectors, so the crossover and catalyst combination is what changes here.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 1141H420 | Header Size: 1-7/8"; Crossover Type: X Pipe; Cat Type: Performance Cats | 1-7/8" headers; Performance Cats X-pipe | Naturally aspirated only |
| 1141H430 | Header Size: 1-7/8"; Crossover Type: X Pipe; Cat Type: GREEN Cats | 1-7/8" headers; GREEN Cats X-pipe | Use the SKU-specific vehicle rows below |
| 1141H460 | Header Size: 1-7/8"; Crossover Type: H Pipe; Cat Type: GREEN Cats | 1-7/8" headers; GREEN Cats H-pipe | Use the SKU-specific vehicle 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. Contact us to discuss the right tuning route for your vehicle.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2011-2014 | Ford Mustang GT | 5.0L V8 | 1141H420, 1141H430, 1141H460 |
Intended use
1141H420: Competition, off-road and track use only. Not for use on public roads.
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 | 1141H420, 1141H430, 1141H460 |
| Application | 2011-2014 Mustang GT 5.0L Coyote |
| Material | 304 stainless steel |
| Headers | 1-7/8" primaries; 3" collectors |
| Rear outlet | 2-3/4" OEM interface |
| Choices | Performance X; GREEN X; GREEN H |
| Performance condition | Naturally aspirated only |
Frequently asked questions
Is an H-pipe available with Performance cats?
The H-pipe kit on this page uses GREEN cats. The Performance choice uses an X-pipe.
Are these for a 2012-2013 Boss 302 side-exhaust setup?
The dedicated Boss 302 H-pipe kit has side-pipe connections. Choose that package when retaining that arrangement.
