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Choose the sound and setup you want for your GT500
Upgrade your GT500 with Kooks long tube headers and a matching GREEN catted crossover. Choose 1-3/4" or 1-7/8" headers and an X-pipe or H-pipe, with all four combinations connecting to the 2-3/4" OEM rear interface. You can choose around both your engine build and the exhaust character you enjoy.
SKUs: 1142H230, 1142H260, 1142H430, 1142H460
X-pipe or H-pipe
An X-pipe merges the two exhaust streams; an H-pipe uses a balance connection between them. In general, the X layout favours a smoother, higher-pitched character, while the H layout is associated with a deeper muscle-car tone. Your rear silencers still play a large part in the final sound.
Two primary sizes, four real combinations
The 1-3/4" and 1-7/8" header choices both use 3" collectors. Each is available with either crossover, and all use GREEN cats. Choose the primary size for your 5.4 or 5.8 build, rather than treating the larger option as an automatic improvement for every car.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 1142H230 | Header Size: 1-3/4"; Crossover Type: X Pipe | 1-3/4" headers; X-pipe | Use the SKU-specific vehicle rows below |
| 1142H260 | Header Size: 1-3/4"; Crossover Type: H Pipe | 1-3/4" headers; H-pipe | Use the SKU-specific vehicle rows below |
| 1142H430 | Header Size: 1-7/8"; Crossover Type: X Pipe | 1-7/8" headers; X-pipe | Use the SKU-specific vehicle rows below |
| 1142H460 | Header Size: 1-7/8"; Crossover Type: H Pipe | 1-7/8" headers; 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.
Matching products
For the 2013-2014 GT500 5.8, the Kooks quad-tip cat-back adds the rear system, oval mufflers and polished tips. It is the later 5.8-litre application, with the matching 2-3/4" front inlet.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2011-2012 | Ford Mustang Shelby GT500 | 5.4L V8 | 1142H230, 1142H260, 1142H430, 1142H460 | |
| 2013-2014 | Ford Mustang Shelby GT500 | 5.8L V8 | 1142H230, 1142H260, 1142H430, 1142H460 |
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 | 1142H230, 1142H260, 1142H430, 1142H460 |
| Application | 2011-2012 GT500 5.4L; 2013-2014 GT500 5.8L |
| Material | 304 stainless steel |
| Primary sizes | 1-3/4" or 1-7/8" |
| Collectors/crossover | 3" collectors; GREEN catted X-pipe or H-pipe |
| Rear outlet | 2-3/4" OEM interface |
| Selectable combinations | Both header sizes with either X or H crossover |
Frequently asked questions
Are all four choices GREEN catted?
Yes. The choices on this page vary the primary size and crossover layout, not the catalyst family.
Which crossover will sound better?
Choose the character you prefer. An H-pipe generally has a deeper character; an X-pipe generally sounds smoother and higher pitched. Rear silencers and the rest of your exhaust also affect what you hear.
Do you recommend tuning with these headers?
We recommend tuning with every header installation. Talk to us about calibration for your vehicle, exhaust and other modifications.
