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SKU: RU-1090 | UPC: 024844009999
K&N Universal Clamp-On Air Filter - 2 1/4in 10 DEG FLG 3 1/2in OD 6in H
The K&N RU-1090 is a round straight universal clamp-on air filter with a 2-1/4 inch inside diameter 10 degree angled flange 3-1/2 inch outside diameter and 6 inch height. It fits racing vehicles radio-controlled cars generators snowmobiles tractors and custom intake applications with matching tube sizes. Cotton gauze media delivers high airflow while flanges provide secure vibration-resistant mounting.
Key Features
- Vibration-Resistant Flanges: Molded pliable rubber flanges absorb engine vibration for stable secure attachment to intake tubes
- Stretch Fit Design: Flanges stretch up to 1/16 inch (1.5mm) to match in-between intake diameters
- Washable Reusable Media: Cotton gauze element cleans easily with K&N kit for repeated use and sustained performance
- High-Flow Construction: Oiled cotton gauze increases air volume to support engine power output
- Precise Dimensions: 2-1/4in ID (10 degree angle flange) 3-1/2in OD 6in height 1-1/16in flange length for exact custom fit
Product Notes
- Confirm intake tube inside diameter of 2-1/4 inches before purchase
- Clean every 50,000 miles or when dirty using K&N air filter cleaner and oil
- Lightweight at 0.8 lb (0.4 kg) for simple handling and installation
Installation Notes
- Professional installation recommended.
- Secure with hose clamp rated for 2-1/4in diameter (clamp not included)
- 10 degree flange angle suits offset intake tube orientations
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| All Years | Various | Racing Vehicles | Custom Intakes |
| All Years | Various | R/C Cars | Performance Builds |
| All Years | Various | Generators | Power Equipment |
| All Years | Various | Snowmobiles | Tractors |
Why Choose K&N?
- Proven air filtration technology used in motorsports worldwide
- Cotton gauze design traps dirt while passing more clean air
- Durable rubber components withstand heat vibration and flex
Frequently Asked Questions
-
Q: Does the RU-1090 fit my custom intake setup?
A: Yes if your intake tube has 2-1/4in inside diameter. The 10 degree flange handles angled mounts and stretches slightly for precise seal. -
Q: What filter media does it use?
A: Four-ply cotton gauze pleated media oiled for optimal dust capture and airflow in universal applications. -
Q: What is the maintenance process?
A: Rinse with K&N cleaner air dry then apply K&N oil. Reusable design eliminates replacement costs over time.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Manufacturer box 7.5 x 4.3 x 4 inches
- Weight: 0.8 lb (0.4 kg)
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