Know the landed cost before you order
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Choose the front connections for your Mustang build
Complete your Mustang's Kooks header upgrade with front pipes that suit your engine and rear exhaust. Choose Competition Only, GREEN or H.O. GREEN connections with 3-inch pipework, then select the rear connection for your vehicle.
SKUs: 11513100, 11513300, 11513400
GREEN and H.O. GREEN explained
11513300 uses 400-cell GREEN cats suitable for forced induction. 11513400 uses H.O. GREEN cats with a 4-1/2" 300-cell substrate. That diameter describes the substrate, rather than the external catalyst body. 11513100 supplies the uncatted Competition Only pipes.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 11513100 | Cat Type: Comp. Only | 3" uncatted front pipes; clamps and rear adapters separate. | Kooks headers; separate OEM adapters or matching Kooks rear route; clamps separate; Uncatted; competition use |
| 11513300 | Cat Type: GREEN Cats | 3" front pipes with 400-cell GREEN cats; forced-induction suitable; clamps and rear adapters separate. | Kooks headers; separate OEM adapters or matching Kooks rear route; clamps separate |
| 11513400 | Cat Type: H.O. GREEN Cats | 3" front pipes with H.O. GREEN cats, 4-1/2" 300-cell substrate; forced-induction suitable; clamps and rear adapters separate. | Kooks headers; separate OEM adapters or matching Kooks rear route; clamps separate |
Matching products
For your 2015-2026 Mustang GT 5.0, the OEM adapter pair supplies both 3-inch to 2-1/4-inch adapters for the factory rear exhaust. Clamps are separate. Alternatively, for the same 2015-2026 GT 5.0 application, the Mustang ULTRA X-pipe includes its mid-pipe adapters and fitting clamps. Choose this route or the standalone OEM adapter pair. For the other applications in the vehicle table, talk to us about the rear connection that suits your engine and exhaust.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2015-2027 | Ford Mustang GT Premium | 5.0L V8 | 11513100, 11513300, 11513400 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2015-2027 | Ford Mustang GT | 5.0L V8 | 11513100, 11513300, 11513400 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2015 | Ford Mustang GT 50 Years Limited Edition | 5.0L V8 | 11513100, 11513300, 11513400 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2019-2020 | Ford Mustang Bullitt | 5.0L V8 | 11513100, 11513300, 11513400 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2020-2022 | Ford Mustang Shelby GT500 | 5.2L V8 | 11513100, 11513300, 11513400 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2021-2023 | Ford Mustang Mach 1 | 5.0L V8 | 11513100, 11513300, 11513400 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2024-2027 | Ford Mustang Dark Horse | 5.0L V8 | 11513100 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
| 2024-2025 | Ford Mustang Dark Horse Premium | 5.0L V8 | 11513100 | Matching Kooks long tube headers; rear connection matched to vehicle, engine and exhaust; front pipes do not include clamps |
Intended use
11513100: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11513100.
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 | 11513100, 11513300, 11513400 |
| Application | Mustang applications and applicable SKUs are listed in the vehicle table; rear connection depends on the vehicle, engine and exhaust |
| Material | 16-gauge 304 stainless steel |
| Front diameter / joint | 3" / ball-and-socket to Kooks headers |
| GREEN 400-cell catalyst | 400-cell; suitable for forced induction |
| H.O. GREEN 300-cell catalyst | 4-1/2" 300-cell substrate; suitable for forced induction |
| OEM rear route | 2015-2026 GT 5.0: separate 11513000-2 adapter pair with separate clamps; alternative 11513700 ULTRA X-pipe supplies mid-pipe adapters and fitting clamps |
| Clamps | Front pipes: not included; standalone OEM adapters: clamps separate; ULTRA X-pipe route: fitting clamps included |
Frequently asked questions
Can I connect these to my factory rear exhaust?
For your 2015-2026 GT 5.0, choose the separate OEM adapter pair and clamps, or the ULTRA X-pipe route with its supplied adapters and fitting clamps. Talk to us about the rear connection for the other applications in the vehicle table.
Which components are shared?
All three choices are 3" front pipes for Kooks headers. The selected SKU determines the catalyst arrangement.
