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Fitment notes and restrictions
Description
Reduce intake restriction with a washable B8 replacement filter
APR RF100028 is a 323 x 128mm direct-replacement filter for listed Audi B8 intake systems. APR uses a lightly oiled, pleated cotton-gauze medium that is washable and reusable, with lower pressure drop than the corresponding stock paper filter.
Key Features
- Flow-bench-optimized replacement-filter design
- Lightly oiled pleated cotton-gauze media
- Washable and reusable construction
- Lower pressure drop than the stock paper filter
- Compatible with the factory intake system
- May sharpen throttle and turbo response
- APR emissions code 2 direct or consolidated replacement part
- Exact APR application is identified by manufacturer part number RF100028
Application details and restrictions
| Years / Scope | Make | Model / Component | Requirement |
|---|---|---|---|
| 2009-2016 | Audi | A4 / A4 Quattro | Compatible factory intake and 323 x 128mm filter |
| 2017 | Audi | A4 allroad | Compatible factory intake and 323 x 128mm filter |
| 2010-2017 | Audi | A5 Quattro | Compatible factory intake and 323 x 128mm filter |
| 2013-2016 | Audi | allroad | Compatible factory intake and 323 x 128mm filter |
| 2011-2017 | Audi | Q5 | Compatible factory intake and 323 x 128mm filter |
Confirm the original filter dimensions and one of APR's listed OEM cross-reference numbers before ordering. Vehicle model alone is not sufficient when intake housings differ.
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | RF100028 |
| Product Type | Direct-replacement intake filter |
| Filter Type | Lightly oiled pleated cotton gauze |
| Color | Red |
| Size | 323 x 128mm |
| Selected OEM Cross References | 06C133842, 2K0133843E, 8K0133843E, 8K0133843M, 8R0133843D, 8R0133843K |
| Emission Code | 2 |
| UPC | 810009934837 |
| California Proposition 65 | Warning applies |
What's Included
- APR RF100028: One red 323 x 128mm APR high-flow intake filter
- Cleaning solution, filter oil, air box, and unrelated intake components are not included
About APR
APR develops performance hardware and software for Audi, Volkswagen, Porsche, and related platforms. Its application-specific components are engineered around verified vehicle, engine, transmission, and emissions requirements rather than model name alone.
Related Parts
- No related store product is linked because supporting components must be verified for the exact vehicle, engine, transmission, and current APR configuration.
FAQ
What is the RF100028?It is intake air filter for the exact application and restrictions shown above.
What are the filter dimensions?APR specifies a size of 323 x 128mm.
Is the filter washable?Yes. The cotton-gauze element is designed to be cleaned, lightly re-oiled, and reused.
Is it a dry filter?No. APR identifies it as a lightly oiled pleated cotton-gauze filter.
Does it fit the factory air box?Yes, when the vehicle uses the compatible factory intake housing and listed filter dimensions.
Will it fit every Audi B8?No. Confirm the model year, intake housing, dimensions, and an applicable OEM cross-reference before ordering.
Does it affect emissions equipment?APR assigns emissions code 2 and identifies it as a direct or consolidated replacement part when used according to the application guide.
Is cleaning solution included?No. Filter-cleaning and oiling supplies are sold separately.
Installation Instructions
- Confirm the vehicle application, 323 x 128mm dimensions, compatible intake housing, and APR RF100028 part label before opening the air box.
- Allow the engine to cool and open the factory air box using the Audi service procedure without damaging clips, screws, sensors, or seals.
- Remove the old filter and clean loose debris from the air-box surfaces without allowing contamination into the intake tract.
- Install the APR filter in the same orientation as the correctly matched factory element and confirm the perimeter seal is fully seated.
- Close and secure the air box, verify every duct and sensor connection, then inspect for gaps or warning lights after starting the engine.
- For later service, wash, dry, and lightly re-oil the cotton-gauze media only according to APR's current filter-care directions.
