K&N 2-1/8in DUAL FLG 6-1/4 X 4inOD 3inH Universal Clamp-On Air Filter

K&N Universal Clamp-On Air Filter | 2-1/8in Dual Flange, 3in Height

Boost performance with the K&N 2-1/8" Dual Flange Universal Air Filter (RU-3510). Features high-flow washable cotton gauze for maximum airflow & horsepower.

The K&N 2-1/8 in Dual Flange Universal Clamp-On Air Filter (Part # RU-3510) is engineered to increase horsepower and acceleration while offering premium filtration. Constructed with four layers of oiled cotton gauze, this filter maximizes airflow into your intake without sacrificing protection against harmful dust and contaminants.

It features ultra-strong, pliable rubber dual flanges that absorb engine vibrations and allow for secure, custom clamp-on attachment. The flexible flange material can stretch up to 1/16 of an inch (1.5mm), accommodating slightly in-between intake size variations. Designed for longevity, this filter comes pre-oiled and is fully washable and reusable, making it an eco-friendly and cost-effective upgrade for custom applications.

Best Uses

1. Dual-Carburetor Setups: Ideal for vintage motorcycles, twin-carb setups, and custom engine builds.
2. Custom & Performance Vehicles: Great for racing vehicles, hot rods, go-karts, and custom intake conversions.
3. Power Equipment & Motorsports: Fits generators, snowmobiles, tractors, and radio-controlled engines.

Features

1. Dual Flange Design: Features two 2-1/8 inch inside diameter flanges spaced for twin-intake or dual-carburetor setups.
2. Pliable Molded Rubber Flanges: Absorbs vibration and stretches up to 1/16 inch (1.5mm) for a snug, secure fit.
3. High-Flow Cotton Gauze: Built with 4 layers of oiled cotton media designed to trap particles while optimizing airflow.
4. Washable & Reusable Media: Engineered to be cleaned and re-oiled for thousands of miles, eliminating disposable filter waste.
5. Compact Dimensions: Outer dimensions of 6-1/4 in x 4 in with a low-profile 3 in height for tight engine bays.

Benefits

1. Increased Horsepower & Acceleration: Improves overall engine performance by allowing maximum air delivery.
2. Long-Term Cost Savings: Eliminates the need to buy replacement paper air filters.
3. Vibration Resistant: Flexible rubber construction keeps the filter securely clamped under high vibration conditions.
4. Low Maintenance: Requires cleaning only every 75,000 miles under normal highway driving conditions.
5. Eco-Friendly Choice: Reusable design prevents single-use disposable filters from ending up in landfills.