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K&N RU-5059 universal clamp-on air filter suits racing vehicles radio-controlled cars generators snowmobiles tractors ATVs and custom intakes with 3-15/16 inch flange inside diameter. Constructed with four layers of premium cotton gauze this washable reusable filter traps contaminants while allowing maximum airflow. Drivers gain horsepower acceleration and engine performance from this easy clamp-on upgrade.
Key Features
- Designed for 3-15/16in inside diameter flanges with 5-1/2in base 4-1/2in top and 4-7/16in height for tapered round applications.
- Engineered Power: Advanced media increases horsepower acceleration and overall engine response.
- Ultra-strong molded rubber flanges absorb vibration stretch up to 1/16 inch for secure fit on in-between sizes.
- Pre-oiled for immediate drop-in use on 3-15/16in ID intake tubes.
- High-flow cotton gauze media for unrestricted airflow.
- Washable reusable construction reduces waste versus 200 million disposable filters in landfills yearly.
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 | RU-5059 |
| 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 RU-5059. 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.
Related K&N Engineering Products
- Shop all K&N Engineering products
- K&N Universal Clamp-On Air Filter 2-3/4in FLG / 4-11/16in B / 3-1/2in T / 4-7/8in H
- K&N Universal Clamp-On Air Filter 2-3/4in FLG / 5-1/16in B / 3-1/2in T / 4-3/8in H
- K&N Universal Clamp-On Air Filter 3-1/4in FLG / 5-3/4in B / 3-1/2in T / 5-7/16in H
Frequently Asked Questions
How do I confirm K&N RU-5059 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 RU-5059 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 RU-5059?
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
- Pre-oiled for immediate drop-in use on 3-15/16in ID intake tubes
- Centered flange uses standard clamps for vibration-resistant mounting
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