Know the landed cost before you order
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An exhaust upgrade built around your GTD
For a dedicated GTD competition build, this Kooks header-back arrangement gives the supercharged 5.2 a matched 3" exhaust behind the headers. It includes front connections, a long-merge ULTRA X-pipe and clamps, finishing at the compatible OEM axle-back. Choose GREEN catted or catalyst-free pipework for the specification you are building.
SKUs: 11575180, 11575380
Retain the compatible OEM axle-back
The package completes matching Kooks long tube headers and connects to the OEM axle-back. You can change the front connections and crossover while retaining the rear section, with the ULTRA X-pipe providing the long-merge crossover layout.
Two catalyst specifications, one competition application
The Competition Only version supplies catalyst-free connections. The GREEN version supplies catted connections. Both versions on this listing are competition, off-road and track-use products, are not for public-road use and require the Kooks competition-use waiver. The presence of a catalyst does not change that stated use.
Plan the full GTD setup
Matching Kooks headers are required and purchased separately. We recommend professional fitting and calibration for the complete system, including alignment, heat clearance, O2 wiring and a first heat-cycle fastener check.
Choose your option
| SKU | Cat Type | Fitting / contents | Stated use restriction |
|---|---|---|---|
| 11575180 | Comp. Only | 3" header-back with ULTRA X-pipe and clamps; OEM axle-back connection; headers purchased separately. | Competition, off-road and track use only. Not for use on public roads. Kooks competition-use waiver required. |
| 11575380 | GREEN Cats | 3" header-back with ULTRA X-pipe and clamps; OEM axle-back connection; headers purchased separately. | Competition, off-road and track use only. Not for use on public roads. Kooks competition-use waiver required. |
Vehicle fitment
| Years | Vehicle and trim | Engine | Applicable SKU / fitting conditions |
|---|---|---|---|
| 2025-2026 | Ford Mustang GTD | 5.2L V8 | 11575180, 11575380 |
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 |
|---|---|
| Application | Ford Mustang GTD, 2025+; supercharged 5.2 |
| System type | Header-back with ULTRA long-merge X-pipe |
| Pipe diameter | 3" |
| Supplied parts | Front connections, ULTRA X-pipe and clamps |
| Rear connection | Compatible OEM axle-back |
| Required headers | Matching Kooks headers, purchased separately |
| Use | Both versions: competition, off-road and track only; no public-road use; competition-use waiver required |
Frequently asked questions
Does this include the headers?
No. It completes matching Kooks long tube headers, purchased separately.
Can I keep the OEM axle-back?
Yes, using the compatible OEM rear connection.
Does the GREEN option make this a road-use product?
No. Both listed GTD versions are competition, off-road and track-use products only and require the competition-use waiver.
Will it fit a Mustang GT or Dark Horse?
This package is specifically for the GTD 5.2 application. Choose an exhaust matched to the GT or Dark Horse for those cars.
