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Make your Coyote truck more enjoyable every time you use it
Upgrade the front exhaust on your 5.0 F-150 with Kooks headers and a matching Y-pipe. Choose 1-3/4-inch headers with GREEN cats, or 1-7/8-inch headers with Performance or GREEN cats. Each joins the OEM rear exhaust, so you can keep your existing cat-back.
SKUs: 1371H230, 1371H420, 1371H430
Choose the complete combination
A smaller primary is not automatically the lesser choice. Choose the 1-3/4" or 1-7/8" header around your engine and modifications, then choose the catalyst for your intended use. The Performance-catted kit is for naturally aspirated applications; GREEN supports forced induction.
A useful route to keep your rear exhaust
Both primary sizes use 3" collectors and a supplied Y-pipe to the OEM rear connection. The 1-7/8" GREEN kit expressly includes the gaskets, bolts and O2 extensions needed for installation. Match the complete kit to your 2021-2026 truck rather than using an earlier F-150 package.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 1371H230 | Header Size: 1-3/4"; Cat Type: GREEN Cats | 1-3/4" headers; GREEN Cats front connections | Use the SKU-specific vehicle rows below |
| 1371H420 | Header Size: 1-7/8"; Cat Type: Performance Cats | 1-7/8" headers; Performance Cats front connections | Naturally aspirated only |
| 1371H430 | Header Size: 1-7/8"; Cat Type: GREEN Cats | 1-7/8" headers; GREEN Cats front connections; Gaskets, bolts and O2 extensions included | Use the SKU-specific vehicle rows below |
Fitting your exhaust
On 2018-on F-150s, the driver-side motor-mount heat shield should be removed or modified to give the header primaries enough clearance.
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 |
|---|---|---|---|---|
| 2021-2026 | Ford F-150 | 5.0L V8 | 1371H230, 1371H420, 1371H430 |
Intended use
1371H420: 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 | 1371H230, 1371H420, 1371H430 |
| Application | 2021-2026 F-150, 5.0L Coyote V8 |
| Material | 304 stainless steel |
| Primary choices | 1-3/4" GREEN; 1-7/8" Performance or GREEN |
| Collectors/Y-pipe | 3" collectors; matching Y-pipe to OEM rear exhaust |
| 1371H430 fitting parts | Gaskets, bolts and O2 extensions included |
| Performance catalyst condition | Naturally aspirated only |
| 2018-on fitting provision | Driver-side motor-mount heat-shield removal or modification recommended for primary-tube clearance |
Frequently asked questions
What changes between the three SKUs?
1371H230 uses 1-3/4" headers with GREEN cats. 1371H420 uses 1-7/8" with Performance cats. 1371H430 uses 1-7/8" with GREEN cats.
Is the original cat-back retained?
The supplied Y-pipe connects to the OEM rear exhaust interface, so a compatible rear system can stay.
