K&N Filter Universal Rubber Filter 2.75in Flange 4.75in Base 4in Top 8in Height

K&N Universal Rubber Air Filter 2.75" Flange | 4.75" Base x 4" Top x 8" Height

Boost horsepower and engine protection with the K&N Universal Clamp-On Air Filter. Features a 2.75" flange, 4.75" base, 4" top, and 8" height. Washable and reusable.

Engineered to increase horsepower and acceleration, the K&N Universal Clamp-On Air Filter is built for high-performance applications where standard air boxes fall short. Featuring a pliable, ultra-strong molded rubber flange, this round tapered filter absorbs vibration and allows a secure clamp-on fitment onto various intake tubing sizes.

Constructed with premium, pre-oiled cotton gauze layers sandwiched between epoxy-coated aluminum mesh, this filter delivers up to 50% more airflow than standard disposable paper filters while maintaining exceptional filtration efficiency. Designed to be washable and reusable, it eliminates the need for frequent replacement filters—saving money over the lifetime of your vehicle or custom build.

Best Uses

1. Custom Cold Air Intakes: Ideal for custom engine builds, engine swaps, and aftermarket cold-air intake kits using 2.75" outer diameter piping.
2. Motorsports & Racing: Built to withstand high-RPM demand in racing vehicles, track cars, and drift setups.
3. Powersports & Off-Road: Excellent performance upgrade for snowmobiles, ATVs, and custom power equipment.
4. Industrial & Specialty Equipment: Frequently utilized on generators, tractors, and custom forced-induction setups needing a high-flow 2.75" clamp-on solution.

Features

1. Precision Dimensions: Features a 2.75-inch flange inner diameter, 4.75-inch base outer diameter, 4-inch top outer diameter, and an 8-inch height.
2. Pliable Molded Rubber Flange: Made from ultra-strong rubber that absorbs engine vibrations and stretches up to 1/16" (1.5mm) for a tight fit.
3. Washable Cotton Media: Multi-layer oiled cotton gauze design offers superior filtration while maximizing air velocity.
4. Universal Clamp-On Design: Easy, bolt-on installation requiring only a standard hose clamp to secure.
5. Durable Molded End Cap: Strong rubber top construction provides optimal structural stability under heavy engine suction.

Benefits

1. Boosts Horsepower & Acceleration: High-flow design reduces air intake restriction, letting your engine breathe easier for improved performance.
2. Reusable & Eco-Friendly: Simply clean and re-oil the filter when dirty, eliminating the need to constantly buy disposable paper filters.
3. Exceptional Engine Protection: Multi-layer filtration media captures dust, dirt, and microscopic debris to safeguard engine components.
4. Vibration Resistant: The flexible rubber flange absorbs engine shakes and movement, preventing cracking or slipping off the intake tube.
5. Cost-Effective Upgrade: Reusable nature and durable build lower long-term maintenance costs over the lifespan of your vehicle or equipment.