AFE Power

'04-08 Ford F-150 5.4L V8 Magnum FORCE Stage-2 Si Cold Air Intake System w/Pro DRY S Filter

  • VENDOR: AFE Power
  • PART#: 51-80512
  • MSRP: Regular price $344.00
  • YOUR PRICE: $292.40

Limited Quantities Available


Magnum FORCE Stage-2 Si Cold Air Intake System w/Pro DRY S Filter Media

This Stage-2 sealed cold air intake system produces 23 hp and 25 lbs. x ft. torque and outflows the factory intake by 69%. Fully enclosed in a heat-shielding molded plastic housing; this air intake system features a washable/reusable conical air filter that improves airflow for increased horsepower and torque. The housing features an auxiliary inlet duct for better airflow as well as a black powder coated aluminum cover that provides ready access to the filter for servicing. This intake system also features a heat-insulating molded plastic tube that replaces the stock intake tract and directs increased air flow with improved volumetric efficiency for maximum performance. The filter is constructed with 100% polyurethane for long life and multiple cleaning cycles.


  • Dyno-Proven Gains up to +23 HP & +25 Lbs. x Ft. TQ
  • Outflows Factory Intake by 69%
  • Washable and Reusable Pro DRY S Air Filter for Maximum Convenience
  • High-Quality Plastic Housing w/ Powder-Coated Cover
  • Utilizes Factory Mounting Locations


  • 5-1/2" Conical Air Filter with Inverted Top: This intake utilizes a huge, 5-1/2" conical Pro DRY S performance air filter with inverted top for maximum flow. This 3-layer progressive, non-oiled air filter provides maximum convenience.
  • Sealed Intake Design: A completely sealed rotomold plastic housing with a black powder coated aluminum top keeps warm engine air out and allows for a cooler, fresher, denser air intake charge.
  • Auxiliary Air Scoop: The sealed housing features an auxiliary air inlet scoop that allows for increased air volume into the intake for increased performance and improved throttle response.
  • Dyno Tuned Intake Tube: The intake tube has been engineered and dyno tested for maximum air flow and velocity for increased performance. All emissions components and bracket locations are used for a hassle-free installation.
  • Hassle-Free Installation: aFe POWER has developed this intake to provide a hassle-free installation that utilizes all factory mounting locations.