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SKU: RU-1720 | UPC: 024844010339
K&N Filter Universal Rubber Round Air Filter 20 Deg Flange Angle 2.25in Flange ID x 3.5in OD x 6in H
This K&N RU-1720 is a high-flow universal air filter for racing vehicles radio-controlled cars generators snowmobiles tractors and custom applications. The 20 degree angled flange ensures a secure fit on offset intakes while pliable rubber construction handles vibration. Deliver more air to your engine for noticeable power gains with easy wash-and-reuse maintenance.
Key Features
- 20 Degree Flange Angle: Matches tapered intake tubes for airtight seal and unrestricted airflow in tight engine bays
- 2.25in Flange ID x 3.5in OD: Precise dimensions clamp securely to 2.25in tubing with 0.75in flange length for vibration-free mounting
- 6in Filter Height: Tall profile provides large cotton gauze surface area to pull in more air volume under high demand
- Pliable Rubber Flanges: Molded construction stretches up to 1/16in absorbs shocks and creates leak-proof connection
- Washable Cotton Gauze Media: Oiled four-layer design traps dirt while flowing 50 percent more air than paper filters lifetime reusability
Product Notes
- Measure intake tube diameter to confirm 2.25in ID fit before ordering
- Re-oil after every cleaning using K&N air filter oil for peak performance
- Packaged in protective box for damage-free delivery
Installation Notes
- Professional installation recommended.
- Use 2.5in stainless steel hose clamp sold separately for secure attachment
- Compatible with rubber or aluminum intake tubing flanges up to 20 degree angle
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| All Years | Universal | Racing Vehicles | Custom Intakes |
| All Years | Universal | Generators | Snowmobiles |
| All Years | Universal | Tractors | R/C Cars |
| All Years | Universal | ATVs | Off-Road Equipment |
Why Choose K&N?
- Proven leader in air filtration since 1969 with motorsports heritage
- Four-layer cotton gauze flows high volumes of clean air for power increases
- Hand-built in USA with exact tolerances for reliable long-term performance
Frequently Asked Questions
-
Q: Will this fit my custom 2.25in intake tube?
A: Yes the 20 degree flange angle and stretchable rubber seal it to straight or angled 2.25in ID tubing up to 3.5in OD perfectly -
Q: What material is the filter made from?
A: High-flow four-layer oiled cotton gauze media with chrome wire top screen and durable molded rubber base for repeated cleaning -
Q: What is the warranty and maintenance?
A: Limited lifetime warranty covers defects clean every 50000 miles or annually with K&N kit for like-new performance
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Compact cardboard box 6.9 x 6.4 x 6.2 inches
- Weight: 1.1 lbs
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