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This aFe filtration component is the Momentum Int Rplcmnt Air Filter w/ Pro 5R Media 3-1/8inF x 6inB x 4-1/2inT (Invert) x 6-1/4inH. Match the exact dimensions, media type, service method, mounting interface, flow requirement, and fluid or air-system application before ordering.
Key Features
- Media and dimensions selected for the listed filtration application
- Service method, flow direction, seal, and replacement interval are model specific
- This aFe Momentum replacement filter uses Pro 5R oiled cotton gauze media in a 3-1/8in inlet flange by 6in height configuration, matching the sizing used across a range of aFe Momentum intake systems.
- The red powder-coated wire support gives it the recognizable aFe look while providing dependable filtration and airflow.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| Universal or specification-matched application. Verify every dimension, interface, operating requirement, and listing note. | |||
Specifications
| Brand | aFe Power |
|---|---|
| Manufacturer Part Number | 20-91211R |
| Product Type | Air Filters - Direct Fit |
| Condition | New |
| Configuration | Momentum Int Rplcmnt Air Filter w/ Pro 5R Media 3-1/8inF x 6inB x 4-1/2inT (Invert) x 6-1/4inH |
| Detail | Value |
| Media Type | Pro 5R Oiled Cotton Gauze |
| Inlet Flange | 3-1/8 in |
| Filter Height | 6 in |
| Color | Red |
| UPC | Not assigned by manufacturer |
| Filter Media | Pro 5R |
What's Included
One new aFe air filters - direct fit in the exact configuration and quantity identified by this listing. Hardware, clamps, couplers, gaskets, sensors, wiring, fluids, calibration, and accessories are included only when expressly stated.
About aFe Power
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
Important Disclosures
- California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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- Shop the complete aFe Power collection
Frequently Asked Questions
How do I confirm the dimensions of the Momentum Int Rplcmnt Air Filter w/ Pro 5R Media 3-1/8inF x 6inB x 4-1/2inT (Invert) x 6-1/4inH (aFe 20-91211R)?
Match the flange or panel dimensions, shape, seal, height, and mounting interface; similar-looking filters are not necessarily interchangeable.
Is this filter washable and reusable?
That depends on its exact media. Follow the aFe cleaning or replacement instructions for the listed media and never oil a dry-media filter.
How often should the filter be serviced?
Inspect it based on driving conditions and restriction rather than mileage alone. Dust, water, off-road use, and construction traffic can shorten the interval.
Can I substitute a different aFe media type?
Only when aFe lists that media as a direct replacement for the same housing and dimensions. Confirm the exact replacement part number before ordering.
Installation Instructions
- Confirm aFe part number 20-91211R, the complete vehicle or specification-based application, and all required supporting components.
- Clean the housing and sealing surface so debris cannot enter the intake, cabin, engine, transmission, or fuel system.
- Install the element in the specified flow direction and orientation without distorting its seal or contaminating clean surfaces.
- Verify the housing closes evenly and record the correct inspection, cleaning, or replacement interval for the operating conditions.
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