aFe 31-10325-1 Magnum FLOW Pro DRY S w/ Foam Pre-Filter 2020-2026 GM Duramax

Vehicle Fitment

• 2020-2026 Chevrolet Silverado 2500HD (WT, Custom, LT, LTZ, High Country, 4WD/2WD, V8-6.6L Duramax L5P Diesel)
• 2020-2026 Chevrolet Silverado 3500HD (WT, Custom, LT, LTZ, High Country, 4WD/2WD, V8-6.6L Duramax L5P Diesel)
• 2020-2026 GMC Sierra 2500HD (SLE, SLT, AT4, Denali, 4WD/2WD, V8-6.6L Duramax L5P Diesel)
• 2020-2026 GMC Sierra 3500HD (SLE, SLT, AT4, Denali, 4WD/2WD, V8-6.6L Duramax L5P Diesel)

Fitment Notes

• Fits 6.6L Duramax L5P diesel engine only - does not fit 6.6L L8T gasoline engine
• Direct OE airbox replacement - no modifications required
• Foam pre-filter is cleanable with aFe POWER Cleaner or by tapping out debris between full cleaning cycles

Features

• Pro DRY S oil-free synthetic media with three progressive layers - strong filtration and airflow with zero re-oiling required
• Includes washable 1/2" open-cell polyurethane foam pre-filter that captures large particles before they reach the main filter media
• ABS plastic retainer secures the foam pre-filter for easy removal, cleaning, and reinstallation
• Rounded deep open pleats expand usable filter surface area for improved dust holding capacity and flow
• Progressive bump seal self-conforms to the factory airbox housing - no gaskets or sealants needed
• Full 360-degree polyurethane frame maintains shape through repeated engine heat cycles
• Washable and reusable - cleaned with aFe POWER Cleaner only, no re-oiling required
• Limited lifetime warranty from aFe POWER

Specifications

• Filter Media: Pro DRY S - 3-layer oil-free synthetic
• Pre-Filter: 1/2" open-cell polyurethane foam with ABS plastic retainer
• Frame Material: Full 360-degree polyurethane
• Seal Type: Progressive bump seal (gasket-free)
• Filter Style: Flat panel OE replacement with foam pre-filter
• Position: Engine intake (factory airbox)
• Cross-Reference: 31-10325 (base version without pre-filter)

Included Components

• 1x aFe Magnum FLOW Pro DRY S OE Replacement Air Filter (31-10325-1)
• 1x Washable foam pre-filter with ABS plastic retainer

Product Description

The aFe POWER Magnum FLOW 31-10325-1 is a direct OE replacement air filter for the 2020-2026 Chevrolet Silverado and GMC Sierra 2500HD/3500HD equipped with the 6.6L Duramax L5P diesel engine. What sets this SKU apart from the standard 31-10325 is the included washable foam pre-filter, which adds an extra layer of protection by capturing large airborne particles before they reach the main filter media - a notable advantage for trucks used in dusty, off-road, or heavy-duty work environments.

The Pro DRY S media delivers strong airflow over the stock paper filter without requiring any re-oiling - simply clean with aFe POWER Cleaner, let air dry, and reinstall. The foam pre-filter can be tapped out between full cleaning cycles for extended service intervals. The progressive bump seal and full 360-degree polyurethane frame ensure a leak-free, long-lasting fit in the factory airbox, making this an ideal drop-in upgrade for Duramax owners who want better engine protection and lower long-term maintenance costs.