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SKU: RU-1900 | UPC: 024844396488
K&N Universal Clamp-On Air Filter 2.25in Flange ID 3.5in OD 2in Height
K&N RU-1900 universal clamp-on air filter fits racing vehicles radio-controlled cars generators snowmobiles tractors and custom intakes with 2.25 inch flange ID. This high-flow filter delivers more air to the engine for better horsepower and acceleration while providing excellent filtration. Constructed with 4-ply cotton gauze and molded rubber flanges that stretch up to 1/16 inch for precise fit.
Key Features
- Washable and Reusable: Clean and reinstall multiple times with K&N cleaning kit for long-term use without replacement
- Horsepower and Acceleration Gains: Increased airflow design pulls in more air to improve engine performance across RPM range
- High Airflow with Filtration: Four layers of cotton gauze trap dirt while allowing 50 percent more air than paper filters
- Malleable Flanges: Ultra-strong rubber flanges absorb vibration stretch 1.5mm and secure to 2.25 inch ID intakes
- Versatile Sizing: One of hundreds of K&N universal shapes for any angle offset or diameter application
Product Notes
- Flange length 0.75 inch centered design suits most clamp-on setups
- Oil-free cleaning recommended every 50,000 miles or annually for dirt-heavy use
- Weight 0.4 lb compact 3.5 x 3.5 x 2 inch size ships easily
Installation Notes
- Professional installation recommended.
- Clamp directly to 2.25 inch ID intake pipe using hose clamp not included
- Flanges compatible with standard worm-gear clamps up to 3.5 inch OD
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| N/A | Universal | Racing Vehicles | Custom Intakes |
| N/A | Universal | Generators | Snowmobiles |
| N/A | Universal | Tractors | ATVs/UTVs |
| N/A | Universal | Radio-Controlled | Cars/Off-Road |
Why Choose K&N?
- Decades of engineering high-performance filtration for motorsports and powersports
- Proven cotton gauze media used by millions of engines worldwide
- Precision-molded components ensure vibration resistance and secure seal
Frequently Asked Questions
-
Q: Will this fit my custom 2.25 inch intake?
A: Yes flanges fit 2.25 inch ID exactly and stretch up to 1/16 inch for slight variations -
Q: What material filters the air?
A: Four layers of oiled cotton gauze provide high-flow filtration down to 5 microns -
Q: What is the warranty coverage?
A: One year limited warranty against defects in materials or workmanship
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective box 4 x 4 x 3 inches
- Weight: 0.4 lb
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