aFe 24-91057 Magnum FLOW Pro 5R Universal Intake Replacement Filter

Vehicle Fitment

• Universal - not made for any specific vehicle. Modifications may be needed depending on your application

Fitment Notes

• Designed as a replacement element for aFe intake systems using a matching 4" inlet flange and inverted conical shape
• Does not require a CARB EO# (Executive Order exemption)

Features

• Pro 5R media: five layers of progressively finer, pre-oiled cotton gauze for maximum airflow
• Up to a 38% increase in flow over a stock paper filter
• Deep, evenly spaced pleats provide excellent dust-holding capacity for longer service intervals
• 100% polyurethane construction, top and bottom, for durability and a proper fit
• Integrated urethane bump seal ensures a tight, no-leak seal over the filter's life
• Washable and reusable across multiple cleaning cycles
• Best suited for maximizing horsepower and torque gains

Specifications

• Shape: Inverted conical
• Filter Media: Pro 5R, pre-oiled cotton gauze (5-layer)
• Inlet Flange Inside Diameter: 4 in
• Base Outside Diameter: 6 in
• Top Diameter (inverted): 4.5 in
• Height: 7 in
• Frame Material: 100% polyurethane

Included Components

• 1x aFe Magnum FLOW Pro 5R Universal Air Filter

Product Description

The aFe 24-91057 is a Pro 5R universal replacement air filter built with an inverted conical shape and a 4-inch inlet flange, designed to match a range of aFe intake systems that use this size and style of filter. Its five-layer, pre-oiled cotton gauze media is aFe's highest-flowing filtration option, delivering up to a 38% airflow increase over a factory paper filter for meaningful gains in horsepower and torque.

The filter's 100% polyurethane top and base include an integrated bump seal that locks in a tight, leak-free connection to the intake housing throughout its service life, while deep, evenly spaced pleats maximize dust-holding capacity and extend the interval between cleanings. Being washable and reusable, it's built to be cleaned and re-oiled rather than replaced outright.

This filter suits owners of a compatible intake system needing a replacement Pro 5R element, or builders assembling a custom intake who need a filter matching this specific flange size and inverted conical shape. Since it's a universal-fit part rather than a direct vehicle-specific application, some modification may be needed depending on your particular setup.