Description
Replacement Filter
This filter features three layers of oil-free synthetic media and requires no oil during maintenance to provide maximum convenience. Its progressive layering provides great filtration efficiency and dust holding capacity, while its inverted top makes for more filter surface area, resulting in longer service intervals. This media is best suited for street and light off-road use. Pro DRY S filters are easily recharged with aFe's POWER CLEANER. aFe POWER performance air filters use a rounded, evenly spaced pleat design which allows for more usable filter surface area, providing increased flow and greater dust holding capacity. This aFe POWER performance air filter is constructed with a polyurethane base and top. Unlike other materials that degrade after repeated heat cycles in an engine bay, polyurethane maintains its original molded shape. Utilizing the filter's external locking tabs, the filter snaps into most Momentum series housings with zero hardware. This patent pending interface allows for easy filter maintenance and replacement.
Additional Information
Momentum Intake Replacement Air Filter w/ Pro DRY S Media 2-1/2 IN F x 4-1/2 IN B x 4-1/2 IN T (Inverted) x 7 IN H
Data: v2 - Desc: v4.2 - Upd: 2026-11-07 15:49:02
Features
- 100% Polyurethane Base and Top for Extra Long Filter Life
- 2-1/2 IN F x 4-1/2 IN B x 4-1/2 IN T (Inverted) x 7 IN H
- Deep, Open Pleats Allow for Increased Surface Area, Flow, and Dust Holding Capacity
- Includes Stainless Steel Clamp
- Innovative Interface for Easy Filter Installation and Maintenance
- Inverted Top Design Makes for More Surface Area, Resulting in Longer Service Intervals
- Molded-In Expanded Metal is Used to Provide Impact Protection
- Pro DRY S Filter Media Features Three Layers of Progressive Synthetic (Dry) Media for Maximum Convenience
- Replacement Air Filter for aFe POWER Momentum Intakes
- Washable and Reusable for Multiple Cleaning Cycles
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Product Details
| Base Diameter: | 4.5 |
| Description: | Momentum Intake Replacement Air Filter w/ Pro DRY S Media |
| Filter Color: | Gray |
| Filter Efficiency: | 99.2 |
| Filter Media Material: | Non-woven Synthetic |
| Filter Style: | Intake Replacement |
| Flange Inside Diameter: | 2.50 |
| Flange Position: | Center |
| Height: | 7 |
| Part Number: | afe21-91151 |
| Pre-Oiled: | No |
| Reusable: | Yes |
| Shape: | Round Cylindrical |
| Top Diameter: | 4.50 |
| Washable: | Yes |
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Afe, Afe Power |
| StreetFX SKU | afe21-91151 |
| SFX Item ID | 4374106 |
| Accounting SKU | afe-21-91151 |
| Manufacturer SKU | 21-91151 |
| Manufacturer UPC | 802959212530 |
| Alternative References | AFE-21-91151 |
Air Filter Element, Pro Dry S, Synthetic, Round Flanged, 4.50 in., 7.000 in. High, Each
If your vehicle spends most of its time on the street, and you desire to maximize airflow, then aFe Pro Dry S air filter elements are an excellent choice. These synthetic oil-less filters feature three layers of progressive media for optimum filtration and flow even when dirty. The filters bump seals eliminate the need for sealants or gaskets since they conform to the filter housings, and always return to their original form. Full 360 degree urethane frames allow proper OE fitment and strength. The elements are available in a wide variety of styles and sizes for fitment on countless applications. For more flow and less mess, order an aFe Pro Dry S air filter element.
| Product Attributes | |
|---|---|
| UPC | 802959212530 |
| Brand | AFE Power |
| Notes | Features inverted, filtered end cap. This item fits aFe POWER cold air intakes 50-70046R, 50-70046D. |
| Quantity | Sold individually. |
| Part Type | Air Filter Elements |
| Filter Color | Gray |
| Product Line | aFe Pro Dry S Air Filter Elements |
| Air Filter Type | Dry |
| Filter Material | Synthetic |
| Air Filter Style | Round flanged |
| Air Filter Height (in.) | 7.00 |
| Air Filter Top Measurement | 4.500 in. diameter |
| Manufacturer's Part Number | 21-91151 |
| Air Filter Bottom Measurement | 4.500 in. diameter |
| Air Filter Outside Diameter (in.) | 4.50 |
| Inlet Flange Inside Diameter (in.) | 2.50 |
Compatibility
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