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A complete exhaust upgrade for your RHD Mustang
Bring out more of your Mustang's V8 character with a front exhaust package put together for right-hand-drive S650 cars. Our bundle combines Kooks 1-7/8" headers, your chosen 3" connection pipes and both adapters for the factory rear exhaust. You can choose the catalyst arrangement around your build, with the main components already matched.
SKUs: HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400
Headers, connections and adapters together
Every bundle includes 11552400 right-hand-drive headers, their gaskets, bolt kit and O2 extensions, plus the 11513000-2 adapter pair. The adapters take the 3" front pipes to the 2-1/4" OEM rear interface. Clamps are purchased separately.
Choose the cats for your engine
GREEN connections use 400-cell cats suitable for forced induction. H.O. GREEN uses a 4-1/2" 300-cell substrate. Competition Only supplies uncatted pipes. The included headers carry a competition-use restriction, which applies to every bundle option, including the catted choices.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| HA-KOOKS-S650-RHD-11513100 | Connection Pipes: Comp. Only | 11552400 headers + 11513100 uncatted pipes + 11513000-2 adapter pair; clamps separate. | Right-hand drive only; 5.0L S650; clamps separate |
| HA-KOOKS-S650-RHD-11513300 | Connection Pipes: GREEN Cats | 11552400 headers + 11513300 400-cell GREEN pipes + 11513000-2 adapter pair; clamps separate. | Right-hand drive only; 5.0L S650; clamps separate |
| HA-KOOKS-S650-RHD-11513400 | Connection Pipes: H.O. GREEN Cats | 11552400 headers + 11513400 H.O. GREEN pipes, 4-1/2" 300-cell substrate + 11513000-2 adapter pair; clamps separate. | Right-hand drive only; 5.0L S650; clamps separate |
Tuning for your exhaust upgrade
We recommend tuning with every header installation so the calibration suits your new headers, complete exhaust and fuel. We offer Mustang GT Stage 1 tuning and Dark Horse Stage 1 tuning for 2024+ S650s. Talk to us about your header upgrade so we can arrange a calibration for the modified exhaust.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2024-2026 | Ford Mustang GT / Dark Horse S650 | 5.0L V8 | HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400 | Right-hand drive only; 5.0L S650; clamps separate |
Intended use
HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400.
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 | HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400 |
| Application | 2024-2026 Mustang GT / Dark Horse 5.0L; right-hand drive only |
| Construction | 304 stainless steel |
| Headers | 11552400; 1-7/8" primaries, 3" outlets |
| Adapters | 11513000-2; one pair, 3" inlet to 2-1/4" OEM outlet |
| Header fitting parts | Gaskets, bolt kit and O2 extensions included |
| Clamps | Purchased separately |
Frequently asked questions
Can I keep the factory rear exhaust?
Yes. Both OEM adapters are included for a rear system using the compatible factory connection.
Are the components the same in every bundle?
The headers and adapter pair are the same. Your selection changes the front connection pipes and catalyst arrangement.
