K&N Universal Clamp-On Air Filter 2-3/4in FLG / 5-1/16in B / 3-1/2in T / 4-3/8in H

K&N Universal Clamp-On Air Filter | 2.75" Flange, High-Flow Performance

Boost horsepower and acceleration with the K&N Universal Clamp-On Air Filter (2-3/4" Flange, 4-3/8" Height). Washable, reusable, and built for maximum airflow.

The K&N Universal Clamp-On Air Filter is engineered to increase horsepower and throttle response by providing up to 50% more airflow than traditional disposable paper filters. Designed for custom intake setups, racing builds, and equipment applications, this round tapered filter features a 2-3/4 inch (2.75 in) inlet flange, a 5-1/16 inch base diameter, a 3-1/2 inch top diameter, and a overall height of 4-3/8 inches.

Constructed with multiple layers of oiled cotton media sandwiched between aluminum wire mesh, this filter captures harmful contaminants while maximizing air intake efficiency. The ultra-strong, pliable rubber flange absorbs engine vibration and allows secure mounting, with up to 1/16 inch (1.5mm) of flex to fit slightly off-size custom intake tubes. Fully washable and reusable, this air filter is designed to last the life of your vehicle or equipment.

Best Uses

1. Custom Engine Air Intakes: Ideal for custom car, truck, or hot rod engine bay intake pipe builds requiring a 2.75-inch inlet connection.
2. Motorsports & Track Vehicles: Excellent for high-RPM racing applications where unrestricted airflow is vital for maximum engine output.
3. Powersports & Off-Road: Suitable for snowmobiles, ATVs, and custom buggies needing reliable filtration and vibration-resistant mounting.
4. Industrial & Specialty Equipment: Fits generators, tractors, and custom equipment requiring high-efficiency air intake protection.

Features

1. Precision Tapered Dimensions: Features a 2-3/4" flange ID, 5-1/16" base OD, 3-1/2" top OD, and a 4-3/8" filter height for tight engine bays.
2. Pliable Molded Rubber Flange: Ultra-durable flexible flange absorbs engine vibrations and stretches up to 1/16" (1.5mm) for an airtight fit.
3. Advanced Oiled Cotton Media: Multi-layered, pre-oiled cotton filter media delivers high filtration capacity without choking air velocity.
4. Simple Clamp-On Installation: Comes ready to install with an included heavy-duty worm-gear hose clamp for quick, secure attachment.
5. Washable & Reusable Construction: Can be cleaned and re-oiled using a K&N Recharger kit, making it a permanent filter replacement.

Benefits

1. Increases Horsepower & Torque: Delivers a higher volume of air to the engine, improving throttle response and engine output.
2. Cost-Effective Long-Term Savings: Eliminates the need to buy disposable paper filters, saving money over the vehicle's lifetime.
3. Superior Engine Protection: Traps dirt, dust, and abrasive debris while maintaining optimal airflow rates.
4. Eco-Friendly Choice: Reduces environmental waste by replacing single-use paper filters with a single reusable filter.
5. Universal Versatility: Flexible mounting dimensions allow seamless adaptation across automotive, racing, and industrial uses.