K&N 77-2577KTK High-Flow Intake Kit for 08-10 Ford F-250/F-350 Super Duty 5.4L

Vehicle Fitment

• 2008-2010 Ford F-250 Super Duty (5.4L V8, RWD/4WD)
• 2008-2010 Ford F-350 Super Duty (5.4L V8, RWD/4WD)

Features

• Mandrel-bent aluminum intake tube for improved airflow
• Oversized washable and reusable oiled cotton gauze air filter
• Replaces factory intake tube and air filter assembly for direct-fit performance
• Estimated horsepower gain ~13.93 HP @ 4077 RPM and torque ~17.9 lb-ft
• Easy installation with basic hand tools - no engine tuning required for stock configuration
• Includes stainless steel hose clamps and mounting hardware
• Lifetime limited warranty from K&N Engineering
• CARB Executive Order D-269-38 (check for state compliance)

Specifications

• Intake tube material: Aluminum with textured black finish
• Filter media: Oiled cotton gauze (red element)
• Clamps included: 5 stainless steel clamps
• Couplers included: 2 silicone couplers
• Estimated weight: ~12.2 lb (5.5 kg)
• Replacement filter: RU-5173
• CARB Executive Order: D-269-38 - legal in all 50 states (verify application)

Included Components

• 1x Mandrel-bent aluminum intake tube
• 1x Oversized washable/reusable oiled cotton air filter
• 1x Heat shield/mounting bracket assembly
• 5x Stainless steel hose clamps
• Complete hardware pack (mounting bolts, spacers, brackets)

Product Description

The K&N 77-2577KTK High-Flow Intake Kit is designed specifically for the 5.4 L V8 engine in the Ford F-250 and F-350 Super Duty trucks from 2008 to 2010. It replaces the factory intake system with a high-flow aluminum tube, oversized reusable filter and dedicated mounting hardware to increase airflow, enhance throttle response, and deliver real-world performance gains (~14 HP/18 lb-ft).

Installation is straightforward and typically completed in under an hour using basic tools. Because the system retains the factory mounting points and does not require engine tuning for stock set-ups, it provides an easy upgrade path. The washable and reusable filter lowers maintenance cost over the long term, and the durable aluminum tube ensures lasting performance.

This intake kit is ideal for Super Duty truck owners who tow, haul or simply want more engine "breathing" and sound while maintaining reliability and driveability. Fitment is confirmed through the 2010 model year; coverage for vehicles beyond 2010 or other engine/trims is unconfirmed at time of listing.