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SKU: RU-3550 | UPC: 024844030610
K&N Universal Rubber Filter 3 1/2 inch FLG / 4 5/8 inch Base / 3-1/2 inch Top / 5 1/2 inch Height
K&N RU-3550 universal clamp-on air filter fits racing vehicles, radio-controlled cars, generators, snowmobiles, tractors and custom intakes with 3.5 inch flange. Molded rubber flanges stretch up to 1/16 inch for secure vibration-absorbing fit. Pre-oiled four-layer cotton gauze media traps dirt while increasing airflow for more horsepower and acceleration.
Key Features
- Four Layers of Protection: Premium cotton gauze with tacking agent forms mesh to block contaminants and protect engine.
- Clean Every 5 Years: Washable design needs service every 75000 miles under highway conditions, based on 15000 annual miles.
- Easy Installation: Pre-oiled and ready to clamp on for immediate performance gains with minimal effort.
- Engineered Power: High-flow media boosts horsepower, acceleration and engine response across applications.
- Rugged Construction: Durable materials and methods ensure lifetime use in demanding environments.
Product Notes
- Flanges absorb vibration and stretch slightly for precise fit on varied intake sizes.
- Wash and re-oil with K&N kit for repeated use without replacement.
- Product weight 1.4 pounds, ships in 8.25 x 8.19 x 6.81 inch box.
Installation Notes
- Professional installation recommended.
- Clamp directly to 3.5 inch inside diameter air intake tube.
- Centered rubber flange with 1.25 inch length ensures secure seal.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Racing Vehicles | Custom Intakes | All |
| Universal | Generators | Snowmobiles | Tractors |
| Universal | ATVs | Dirt Bikes | RC Cars |
Why Choose K&N?
- Proven leader in high-flow filtration for motorsports and powersports.
- Reusable filters cut replacement costs and landfill waste.
- State-of-the-art engineering for reliable airflow in any setup.
Frequently Asked Questions
-
Q: Does RU-3550 fit offset or angled intakes?
A: Yes, flexible rubber flange adapts to angles and diameters up to 1/16 inch stretch for custom applications. -
Q: What material is used in the filter media?
A: Four layers of oiled cotton gauze provide deep trapping without restricting airflow. -
Q: What is the warranty and cleaning interval?
A: 1-Year Limited Warranty covers defects, clean every 75000 miles or 5 years with proper care.
Shipping & Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Secure box 8.25 x 8.19 x 6.81 inches
- Weight: 1.4 pounds
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