High-Flow Intake Performance: The K&N 57-1526 Fuel Injection Performance Kit is engineered to significantly increase airflow to your 4.0L engine, improving combustion efficiency and overall performance.
Increased Horsepower & Torque: Designed to deliver measurable gains in horsepower and torque, enhancing throttle response and acceleration for a more responsive driving experience.
Reusable High-Performance Air Filter: Features K&N’s premium washable and reusable oiled cotton air filter, providing maximum airflow while effectively capturing dirt and contaminants for long-term engine protection.
Reduced Intake Restriction: Replaces the restrictive factory air intake system with a high-flow design, allowing your engine to breathe more freely and operate more efficiently.
Enhanced Engine Sound: Produces a deeper, more aggressive intake tone under acceleration while maintaining smooth and controlled sound levels during normal driving.
Vehicle-Specific Fitment: Designed for 1999–2004 Jeep Grand Cherokee WJ models equipped with the 4.0L 6-cylinder engine, ensuring precise fitment and a straightforward installation process.
Durable Construction: Built with high-quality materials to withstand engine heat and demanding driving conditions, delivering long-lasting performance and reliability.
CARB Notice
- 50 State Legal - CARB E.O. Number D-269-28
K&N's Fuel Injection Performance Kits (FIPK) promote performance in stock fuel-injected engines by increasing air intake with less resistance. By replacing the entire air intake tract, isolating the cold air with the use of a custom heat shield, and directing the air through a unique chamber delivery system, these Cold Air Intake kits consistently achieve horsepower gains even under varying atmospheric conditions. Dyno test results showed torque increases through the towing ranges of up to 23 ft. lbs. FIPKs are legal in all 50 states. You get better acceleration and instant power even when towing. K&N delivers performance that's guaranteed for 10 years or one million miles.
57-1526 Product Specifications:
Product Style: 57 Series FIPK
Estimated Horsepower Gain: 7.73 HP @ 4711 RPM
Type: Gen II
Replacement Filter: RC-4700
CARB Exempt: Yes
Weight: 10.4 lb (4.7 kg)
Product Box Length: 21 in (533 mm)
Product Box Width: 12.25 in (311 mm)
Product Box Height: 12.38 in (314 mm)
Air Filter
Intake Tube
Heat Shield
Edge Trim
Three Hose Clamps
Tapered Silicone Hose
Grommet
Mounting Brackets
Nuts, Bolts & Washers
Installation Instructions
- Engine Size: 4.0L I-6
- Engine Fuel: Gasoline
- Shipping Weight: 13lb
Jeep Grand Cherokee (WJ)
- 2004 Jeep Grand Cherokee (WJ)
- 2003 Jeep Grand Cherokee (WJ)
- 2002 Jeep Grand Cherokee (WJ)
- 2001 Jeep Grand Cherokee (WJ)
- 2000 Jeep Grand Cherokee (WJ)
- 1999 Jeep Grand Cherokee (WJ)
- Shared By Others
- Share a Photo
- Ask a Question
- Write a Review





















