Know the landed cost before you order
Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.
Choose a Kooks package for the Godzilla build you want
Bring headers, catted front connections and fitting hardware together for your 7.3-litre Super Duty. These Kooks packages offer 1-7/8" GREEN, 1-7/8" H.O. GREEN and 2" GREEN combinations, each joining the OEM rear exhaust on the supported 2020-2022 F-250 and F-350.
SKUs: 1400H430, 1400H440, 1400H630
Choose the primary and catalyst together
Choose 1-7/8-inch headers with GREEN or H.O. GREEN cats, or 2-inch headers with GREEN cats. Each option uses 3-inch collectors.
Keep the rear exhaust you already have
Each package supplies stainless connections to the OEM rear exhaust and the installation hardware. A rear system using the factory interface can remain, keeping the purchase focused on the engine-to-rear-exhaust conversion.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 1400H430 | Header Size: 1-7/8"; Cat Type: GREEN Cats | 1-7/8" headers; GREEN Cats front connections; Installation hardware included | Use the SKU-specific vehicle rows below |
| 1400H440 | Header Size: 1-7/8"; Cat Type: H.O. GREEN Cats | 1-7/8" headers; H.O. GREEN cats front connections; Installation hardware included | Use the SKU-specific vehicle rows below |
| 1400H630 | Header Size: 2"; Cat Type: GREEN Cats | 2" headers; GREEN Cats front connections; Installation hardware included | 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.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2020-2022 | Ford F-250 Super Duty Platinum | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-250 Super Duty King Ranch | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-250 Super Duty XL | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-250 Super Duty Lariat | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-250 Super Duty XLT | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-350 Super Duty XLT | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-350 Super Duty King Ranch | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-350 Super Duty Platinum | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-350 Super Duty XL | 7.3L V8 | 1400H430, 1400H440, 1400H630 | |
| 2020-2022 | Ford F-350 Super Duty Lariat | 7.3L V8 | 1400H430, 1400H440, 1400H630 |
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 | 1400H430, 1400H440, 1400H630 |
| Application | 2020-2022 F-250 / F-350 Super Duty 7.3L Godzilla petrol V8 |
| Material | 304 stainless steel |
| Primary / catalyst choices | 1-7/8" GREEN; 1-7/8" H.O. GREEN; 2" GREEN |
| Collectors | 3" |
| Rear interface | OEM exhaust |
| Included | Headers, selected catted connections and installation hardware |
Frequently asked questions
Which kit has 2-inch headers?
1400H630 pairs 2" headers with GREEN catted connections.
Is H.O. GREEN available with the smaller primary?
Yes. 1400H440 is the 1-7/8" H.O. GREEN package.
