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This K&N RG-1001RD-L clamp-on universal air filter features a chrome top and red oiled cotton gauze media in a round tapered design with 4in ID 1.125in flange length and 5.5in height. It fits custom cold air intake systems on cars trucks motorcycles and ATVs with 3in to 4in inlets using included adapters for versatile performance upgrades. Expect higher airflow than paper filters for added horsepower quicker throttle response and reusable filtration that cleans easily.
Key Features
- Adjustable Flange Inside Diameter: Fits 4in 3.5in or 3in (102mm 89mm 76mm) inlets with included inserts for broad compatibility in custom setups
- Dimensions: Top OD 4.75in (121mm) base OD 6.125in (156mm) overall OD 6in (152mm) height 5.5in (140mm) flange length 1.125in (29mm) for compact high-capacity airflow
- Filter Material: Oiled cotton gauze traps dirt while allowing maximum air passage for consistent power gains over stock filters
- Chrome Top and Red Filter: Durable metal chrome lid pairs with red media for striking visuals and vibration-resistant seal
- Part Weight: 1.7lb (0.8kg) lightweight design eases handling during install
Fitment
| Fitment Status | Universal or dimensional product |
|---|---|
| Required Verification | Exact dimensions, media, connection, mounting interface, and companion part number |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | RG-1001RD-L |
| Product Type | Air Filters - Universal Fit |
| Fitment Type | Universal |
| Condition | New |
What's Included
One new K&N air filters - universal fit identified by manufacturer part number RG-1001RD-L. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.
About K&N Engineering
K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.
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Frequently Asked Questions
How do I confirm K&N RG-1001RD-L fits my setup?
Match every listed dimension, flange or thread size, media type, mounting interface, and companion component. A similar shape or outside dimension alone does not confirm compatibility.
Is K&N RG-1001RD-L washable and reusable?
Serviceability depends on the exact media used for this part number. Follow the K&N cleaning and oiling directions for this filter and never apply oil to media specified as dry.
What should be checked after installing K&N RG-1001RD-L?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.
Installation Instructions
- Clamp directly onto 3in 3.5in or 4in inlet tubing using included inserts no cutting required
- Uses centered flange with molded rubber for tight vibration-proof seal
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