Upgrade your intake system with the aFe 24-91042 Magnum FLOW Pro 5R Air Filter, a high-performance replacement for the Donaldson ECB085011 BHAF (Big Honkin’ Air Filter). Engineered for serious airflow and filtration, this conical air filter features Pro 5R factory-oiled media—delivering up to 19% more airflow than the OE paper element (427 CFM at 1.5" H₂O).

Built with five layers of progressively finer oiled cotton gauze, this filter maximizes horsepower and torque while maintaining high dust-holding capacity. The 100% polyurethane top and base offer long-lasting durability, and the flange is reinforced with an embedded metal ring to prevent distortion and ensure a leak-free seal—even under high suction loads.

Washable and reusable, the 24-91042 is built for multiple cleaning cycles and extended service intervals, making it a long-term upgrade for high-demand diesel and performance setups.

Key Features:

• Part Number: 24-91042

• Media: Pro 5R – Five-layer progressively finer oiled cotton gauze

• Replaces: Donaldson ECB085011 (BHAF)

• Airflow: 19% more flow – 427 CFM at 1.5" H₂O

• Construction:

  • 100% polyurethane top and base

  • Embedded metal ring in flange prevents seal failure

• Reusable: Washable and reusable for multiple cleanings

• Performance: Built for maximum horsepower, torque, and filter life

• Essentials: Pre-Filter - 28-10293

Fitment / Sizing:

• Flange Diameter: 4"

• Base: 8.5"

• Top: 8.5" (Inverted)

• Height: 11"

Note: Universal application—ensure fitment based on dimensions and filter housing specs.

What’s Included:

• 1 x aFe Magnum FLOW Pro 5R Air Filter – Part #24-91042

• Installation Instructions