K&N 57-2525-2 Performance Air Intake for 1996,1999-2004 Ford F-Series Super Duty

Vehicle Fitment

• 1996 Ford F-250 Super Duty 5.4L V8
• 1996 Ford F-350 Super Duty 5.4L V8
• 1999-2004 Ford F-250 Super Duty 5.4L V8
• 1999-2004 Ford F-350 Super Duty 5.4L V8
• 2000-2004 Ford Excursion 5.4L V8

Features

• Rotationally-molded high-density polyethylene (HDPE) intake tube for increased airflow
• Oversized washable & reusable oiled-cotton gauze High-Flow™ air filter
• Custom heat shield to protect intake air from engine bay heat
• Direct-fit design utilizing factory mounting points
• Designed to increase horsepower and torque
• Filter service interval up to 100,000 miles under normal highway driving conditions
• Simple installation requiring basic hand tools
• No ECU tuning required
• 50-state legal under CARB Executive Order D-269-25

Specifications

• Estimated horsepower gain: +11.61 hp @ 4,480 RPM
• Estimated torque gain: Not specified
• Filter material: Oiled cotton gauze
• Intake tube material: High-density polyethylene (HDPE)
• Replacement filter: RU-1048
• Clamp quantity: 7 stainless-steel clamps included
• CARB EO Number: D-269-25

Included Components

• 1x High-flow oiled cotton gauze air filter
• 1x HDPE intake tube assembly
• 1x Heat shield assembly
• 7x Stainless-steel hose/clamp assemblies
• Mounting hardware kit (brackets, bolts, etc.)
• Installation instructions

Product Description

The K&N 57-2525-2 Performance Air Intake System is engineered specifically for the 1996, 1999-2004 Ford F-Series Super Duty trucks and 2000-2004 Ford Excursion equipped with the 5.4L V8 engine. This direct-fit intake system replaces the restrictive factory air box and intake tubing with a high-flow HDPE intake tube, oversized washable filter, and protective heat shield designed to reduce intake-air temperatures and increase airflow. These improvements yield measurable gains in horsepower and torque, while remaining fully legal for road use.

Installation is straightforward, requiring only basic hand tools and utilizing existing factory mounting points. The design retains your factory mass-air-flow sensor and original calibration, so no ECU retuning is necessary. With the washable filter rated for up to 100,000 miles between servicing, this kit offers both performance and longevity. Backed by K&N's No-Hassle Lifetime Limited Warranty, it's built to last.

Fitment is confirmed for model years 1996, 1999-2004 on the Ford F-Series Super Duty and 2000-2004 Ford Excursion with the 5.4L V8 engine. Always verify your vehicle's engine size and trim designation prior to purchase.