SKU: 21-28001 | UPC: 802959210017
aFe Power Magnum FLOW Universal Air Filter w/ Pro DRY S Media 2-3/4 IN F x 6 IN B x 4-3/4 IN T x 5 IN H
The aFe Power 21-28001 Magnum FLOW air filter uses Pro DRY S media for clamp-on universal fit in custom intake systems with 2.75-inch inner diameter tubes. This oil-free filter boosts engine airflow while capturing 99.2% of dust and debris. Washable design supports repeated use with simple soap and water cleaning for lasting performance.
Key Features
- Pro DRY S Media: Three layers of synthetic mesh between polyurethane top and base trap particles at 99.2% efficiency without oil for clean power delivery
- Dimensions: 2.75-inch flange ID, 6-inch base OD, 4.75-inch top OD, 5-inch height fit tapered intake tubes precisely
- 100% Polyurethane Frame: Seals all sides for extended durability and no-leak performance over time
- Washable and Reusable: Clean multiple times with soap and water extending service life between replacements
- Pliable Flange with Bumps: Ensures airtight seal on intake tubing for reliable filtration and airflow
Product Notes
- Gray non-woven synthetic filter media requires no oiling before use
- Clean every 30,000-50,000 miles based on driving conditions
- Packaged in protective box with 8.5 x 8.25 x 6.75 inch dimensions
Installation Notes
- Professional installation recommended.
- Clamp-on style slides over 2.75-inch ID intake tube
- No additional hardware needed for compatible aFe or custom systems
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | All | 2.75in Flange Clamp-On Intakes |
Why Choose aFe Power?
- Direct-fit engineering from motorsport testing
- High-flow media tested for real-world dust holding
- Polyurethane construction built for repeated cleanings
Frequently Asked Questions
-
Q: Will this filter fit my custom intake setup?
A: Yes it clamps onto any 2.75-inch inner diameter tube including aFe POWER systems with matching flange size -
Q: Is the filter media pre-oiled?
A: No Pro DRY S synthetic media arrives dry and stays oil-free for easy maintenance -
Q: What is the cleaning process and warranty?
A: Wash with soap and water then air dry reusable indefinitely if undamaged aFe POWER offers limited lifetime on defects
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Protective box 8.5 x 8.25 x 6.75 inches
- Weight: 1.35 pounds

aFe
aFe Power / Advanced FLOW Engineering performance parts deliver proven power gains, improved efficiency, and uncompromising reliability for street, track, and off-road builds. Founded in 1999, aFe Power has become one of the most trusted names in automotive performance, designing and manufacturing high-quality intake systems, exhaust components, filtration solutions, and engine upgrades right here in the USA. Built on an engineering-first philosophy, Advanced FLOW Engineering (aFe) develops products using advanced R&D, in-house testing, and precision manufacturing to ensure consistent results, excellent fitment, and long-term durability across gas and diesel platforms alike. Shop the complete lineup of aFe Power performance parts at Black Ops Auto Works, including cold air intakes, exhaust systems, high-performance air filters, diesel upgrades, and supporting hardware designed to work together for predictable, repeatable gains. aFe Cold Air Intakes & Airflow Upgrades aFe Pow... View Our aFe Products...
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