aFe 21-91045 Pro DRY-S Universal Air Filter 4"-5" Clamp-On

Vehicle Fitment

• Universal fit - Designed for aftermarket or custom intake systems with 4"-5" clamp tubes

Features

• Pro DRY-S oil-free synthetic media for easy maintenance
• Multi-layer progressive filtration for improved airflow and debris capture
• Washable and reusable design reduces long-term cost
• Durable polyurethane frame resists heat and chemicals
• Integrated bump seal ensures a secure, leak-free clamp fit
• Open pleat design increases usable media surface area
• Tapered shape promotes efficient air entry and flow
• Universal clamp-on style adapts to many intake configurations

Specifications

• Brand: aFe
• Part Number: 21-91045
• Filter Type: Clamp-On Air Filter
• Filter Media: Pro DRY-S synthetic media
• Clamp Range: Fits 4"-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 (21-91045)

Product Description

The aFe MagnumFLOW Pro DRY-S Air Filter (21-91045) is a high-performance universal clamp-on air filter engineered for aftermarket and custom intake applications where standard vehicle-specific filters are not suitable. Featuring oil-free Pro DRY-S synthetic media, this filter eliminates the need for re-oiling after maintenance - simply wash and reuse. The multi-layer design balances improved airflow with effective protection against debris compared to traditional paper elements.

Built with a durable polyurethane frame and an integrated bump seal, this universal filter ensures a secure, leak-free fit when clamped onto intake tubes ranging from 4" to 5" in diameter. The open pleat construction increases usable filter media surface area, promoting enhanced engine breathing and performance in performance intake systems, turbo inlets, or custom cold air setups. Ideal for enthusiasts seeking easy upkeep and improved airflow in custom applications.