The Kooks 1371H420 1-7/8-inch Header and Catted Connection Kit transforms the 2021 and 2025 Ford F-150 5.0L Coyote V8 by replacing restrictive factory manifolds with long-tube headers and high-flow catted Y-pipes that unlock over 60 horsepower and 50 lb-ft of torque to the rear wheels, while preserving emissions compliance for daily driving.
Handcrafted from T304 aircraft-quality stainless steel, the equal-length primaries and merged collectors optimize exhaust scavenging across the full RPM range, delivering crisp throttle response and a deep, aggressive exhaust note without drone on the highway.
The 3-inch catted connection pipes integrate seamlessly with the OEM mid-section, supporting up to 850 HP for tuned trucks or heavy towing, and feature precision laser-cut 3/8-inch flanges to eliminate warping under heat cycles. For F-150 owners seeking a bolt-on upgrade that balances power gains, sound refinement, and legal street use, this kit provides the engineered path to maximize the Coyote's potential in work, play, or track scenarios.
Warranty: Limited lifetime to original purchaser on materials and construction.
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2021 and 2025 | Ford | F-150 | XL, XLT, Lariat 5.0L Coyote V8 (4V) |
| 2021 and 2025 | Ford | F-150 | King Ranch, Platinum 5.0L Coyote V8 (4V) |
| 2021 and 2025 | Ford | F-150 | Limited 5.0L Coyote V8 (4V) |
Note: Fits standard cab, super cab, and super crew configurations with 5.0L V8. Excludes Tremor, Raptor, and hybrid variants.
Total Package Weight: 65 lbs | Shipping Dimensions: 48" L x 24" W x 18" H (crated for freight shipment)
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