Description
The K&N Filters FIPK Air Intake Kit for 03-04 Lincoln Navigator 5.4L V8 (KNN57-2551) is engineered to improve airflow to the engine, delivering increased horsepower and torque for the 5.4L V8 engine. This high-performance intake system replaces the restrictive factory air filter and intake tubing with a free-flowing, custom-tuned design. It is designed for a precise fit and includes a washable and reusable cotton gauze filter and a heat shield to reduce intake temperatures. The result is better throttle response and acceleration. This K&N FIPK kit is 50-state street legal and backed by a 10-year/Million Mile Limited Warranty, making it a reliable upgrade for power-hungry drivers.
Features and Specifications:
- Vehicle Fitment: 2003-2004 Lincoln Navigator with 5.4L V8 engine
- Air Filter Color: Red
- Air Filter Material: Cotton Gauze
- Air Filter Outlet Shape: Round
- Included: Mounting Hardware, 6 Clamps, and 2 Couplers
- Clamp Material: Stainless Steel
- Clamp Style: Regular
- Intake Pipe Color / Finish: Black
- Intake Pipe Material: High-Density Cross-Linked Polyethylene
- CARB EO Number: D-269-28
- Estimated Horsepower Gain: 15.48 HP @ 5049 RPM
- Replacement Filter: RU-1020
- Alternate Replacement Filter: RF-1020
- Increased Performance: Boosts horsepower and torque for improved engine output.
- HDPE Intake Tube: Roto-molded for durability and efficient airflow.
- High-Flow Filter: Direct replacement air filter enhances throttle response and engine sound.
- Optimized Airflow: Engineered for high airflow and superior filtration efficiency.
- Low Maintenance: Filter requires cleaning only every 100,000 miles under everyday driving.
- Easy Installation: Installs in under 60 minutes using basic hand tools.
- Lifetime Warranty: Covered by a No-Hassle Lifetime Limited Warranty.
- Emissions Legal: 50-state legal for street use.






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