Cold Air Intake Kit for 1997-2003 Ford F-150 Expedition 4.6L/5.4L V8

Ford's 4.6L and 5.4L Modular V8S are workhorses — but the factory intake on 1997-2003 F-150 and Expedition was designed for quiet operation and parts-bin cost savings, not airflow. The stock system draws air through a restrictive paper-panel filter inside a sealed plastic box, then routes it through a narrow, ribbed intake tube choked with resonance chambers. The engine does the work — it just does it with one hand tied behind its back.

This Flashark cold air intake replaces the entire factory setup with a large-diameter aluminum intake tube and a high-flow dry cone filter enclosed in a heat shield. The smooth mandrel-bent tubing eliminates turbulence and restriction in the stock ribbed plastic path, while the open-element filter draws cooler, denser air from inside the shielded engine-bay pocket. On an otherwise stock 4.6L or 5.4L, expect 5-10 wheel horsepower and a noticeably sharper throttle tip-in — especially in the 2,000-4,000 RPM range where these trucks spend most of their working life.

Installation is a direct bolt-on affair. The heat shield mounts to factory bolt locations, the intake tube aligns with the stock throttle body using the included silicone coupler, and the filter clamps onto the tube inside the shield. No cutting, no drilling, no permanent modifications. Basic hand tools, under an hour, and your Modular V8 breathes as it should.

Key Features

Large-Diameter Mandrel-Bent Aluminum Intake Tube — Single-piece construction with integrated MAF sensor flange. Finished in heat-resistant matte black powder coat. Delivers a smooth, unrestricted airflow path that eliminates the turbulence and restrictions of the factory-ribbed plastic tube and its multiple resonance chambers.

Heat-Shielded Dry Cone Filter — High-flow red cotton-gauze element enclosed in a formed steel heat shield. The shield blocks direct engine heat while drawing cooler air from the fender-well pocket. Dry-type media requires no oiling — clean, rinse, dry, and reinstall for the life of the vehicle.

Direct-Fit Silicone Coupler — Bridges the intake tube to the throttle body with a precise, airtight connection. Heat-resistant silicone won't crack, deform, or collapse under engine bay temperatures or vacuum.

Complete Hardware Kit — All mounting brackets, clamps, breather hose connectors, and fasteners included. Everything shown in the product images is in the box — no extra parts to source.

True Bolt-On Installation — Mounts to factory bolt locations using the included bracket and hardware. The stock airbox can be reinstalled at any time. No cutting, drilling, or permanent modification required. Basic hand tools, 45-60 minutes.

5-10 WHP on Stock Tune — Realistic gain on an otherwise stock 4.6L or 5.4L 2V Modular V8. The most noticeable improvement is sharper throttle response and stronger mid-range pull between 2,000-4,000 RPM, not a peak dyno number.

Deep V8 Induction Sound — The open-element filter and aluminum tube produce a throaty, aggressive intake growl at half-throttle and above. Audible in the cab under load without being obnoxious at cruise. Complements an aftermarket cat-back exhaust perfectly.

No Tune Required — Factory ECU's MAF-based fuel trim system adapts to the increased airflow within its correction range. Bolt it on, start it up, and drive.

Specifications

SKU: FLIS25006
Intake Tube Material: Aluminum
Intake Tube Finish: Matte black powder-coated
Filter Type: Dry
Filter Media: Red cotton-gauze
Heat Shield: Formed steel, black finish
Estimated Install Time: 45-60 minutes

Package Includes

2 × Matte black powder-coated aluminum intake tube
1 × High-flow red dry cone air filter
1 × Formed steel heat shield
2 × Silicone throttle body coupler
1 × Complete hardware kit
1 × Installation guide