aFe 21-90021 Pro DRY-S Universal Air Filter 3"-5" Clamp-On

Vehicle Fitment

• Universal fit - Designed for custom or aftermarket intake systems with 3"-5" clamps

Features

• Pro DRY-S oil-free synthetic media for easy maintenance
• Multi-layer progressive filtration for improved airflow and dust capture
• Washable and reusable design reduces long-term cost
• Durable polyurethane top and base resist heat and chemicals
• Integrated bump seal ensures secure, leak-free clamp fit
• Open pleat design increases usable media surface area
• Universal clamp-on style for adaptability with many intake setups
• Improves engine breathing over stock paper filters

Specifications

• Brand: aFe
• Part Number: 21-90021
• Filter Type: Clamp-On Air Filter
• Filter Media: Pro DRY-S synthetic media
• Clamp Range: Fits 3"-5" intake tubes
• Filter Shape: Tapered/conical universal design
• Reusable/Washable: Yes
• CARB Legal: No (universal application)

Included Components

• 1x aFe MagnumFLOW Pro DRY-S Universal Clamp-On Air Filter (21-90021)

Product Description

The aFe MagnumFLOW Pro DRY-S Air Filter (21-90021) is a universal, clamp-on performance filter engineered for custom intake systems, short-ram setups, turbo inlets, and other aftermarket applications where vehicle-specific filters aren't suitable. Its oil-free Pro DRY-S synthetic media eliminates the need for re-oiling and can be cleaned with simple washing, making routine maintenance fast and hassle-free.

Featuring a durable polyurethane frame and an integrated bump seal, this filter ensures a secure, leak-free fit across a versatile 3"-5" clamp range. The open pleat design maximizes usable media surface area to promote increased airflow compared to traditional paper elements, helping improve engine breathing and performance in tuned or custom intake configurations. Ideal for enthusiasts building or upgrading performance intake systems with non-OEM components.