aFe 24-91020-MA MagnumFLOW Pro 5R Oiled Conical Air Filter Pair 4 Inch Inlet

Vehicle Fitment

• Universal - Replacement filter pair for aFe Magnum FORCE dual cold air intake systems and custom dual-intake builds using 4-inch inlets

Fitment Notes

• This is a universal matched pair - verify your intake system uses two 4 IN inlet filters before purchase
• Designed as replacement filters for aFe POWER Magnum FORCE dual cold air intake systems
• Pro 5R (oiled) media requires re-oiling with aFe blue air filter oil after each cleaning - do not use dry
• Not CARB legal - not for sale in California or other CARB-adopting states

Features

• Five layers of progressively finer pre-oiled cotton gauze Pro 5R media - aFe's highest-flowing filter media
• Matched pair (2 filters) with two stainless steel clamps - ready to install as a set on dual intake applications
• Progressive layering maintains strong airflow even when dirty for extended service intervals
• Inverted top design maximizes filter surface area for longer service life between cleanings
• Rounded deep open pleats provide increased surface area, flow capacity, and dust holding capability
• Pliable polyurethane flange with integrated bump seal - tight, leak-free fit without gaskets or sealants
• 100% polyurethane base and top resist heat cycles and maintain original molded shape
• Recharged with aFe POWER CLEANER and blue Pro 5R air filter oil - perfect for street and track use

Specifications

• Filter Style: Conical, universal clamp-on (matched pair)
• Filter Media: Pro 5R - 5-layer progressively finer pre-oiled cotton gauze
• Flange (Inlet) ID: 4 in
• Base Diameter: 6 in
• Top Diameter: 4-1/2 in (inverted)
• Height: 6 in
• Quantity: 2 filters (matched pair)
• Oil Required: Yes - recharged with aFe blue Pro 5R air filter oil
• CARB Status: Not CARB legal - not for sale in California
• Fitment Type: Universal clamp-on

Included Components

• 2x aFe Pro 5R Conical Air Filters (matched pair)
• 2x Stainless Steel Clamps

Product Description

The aFe POWER 24-91020-MA is a matched pair of universal 4-inch Pro 5R oiled cotton gauze conical air filters, designed as the replacement filter set for aFe Magnum FORCE dual cold air intake systems or any custom dual-intake build requiring two 4-inch inlet filters. The "-MA" suffix denotes a Matched Air filter two-pack, sold together with two stainless steel clamps for complete installation. The Pro 5R five-layer oiled cotton gauze media is aFe's highest-flowing filter option, delivering maximum airflow performance on the street and at the track.

The inverted top and rounded deep open pleats maximize usable filter surface area, while progressive media layering allows the filters to maintain strong airflow even as they accumulate dirt - extending cleaning intervals. The 100% polyurethane base and top hold their shape through repeated engine bay heat cycles, and the integrated bump seal delivers a consistent, leak-free seal without gaskets. After cleaning with aFe POWER CLEANER, these filters are re-oiled with aFe's blue Pro 5R air filter oil before reinstallation.