K&N RA-0500 Round Cotton Gauze Universal Clamp-On Air Filter, 2-1/16in FLG

Vehicle Fitment

• Universal - not vehicle-specific; designed for a wide range of applications including racing vehicles, small engines, generators, snowmobiles, and tractors

Fitment Notes

• Clamp-on design fits carburetor or intake necks matching the flange diameter; rubber flange can stretch up to 1/16 in. to accommodate in-between sizes
• Not a direct factory drop-in for any specific make or model - confirm intake neck diameter matches before ordering

Features

• Four layers of premium cotton gauze treated with a specially designed tacking agent
• Intricate filter media mesh designed to block and trap harmful contaminants
• Ultra-strong molded pliable rubber flange absorbs vibration for a secure attachment
• Flange can stretch up to 1/16 in. (1.5mm) to fit in-between sizes
• Washable and reusable, built to last with rugged, durable construction
• Suited to a wide variety of equipment including racing vehicles, RC cars, generators, snowmobiles, and tractors
• Pre-oiled and ready for easy installation
• Backed by K&N's warranty against defects in materials and workmanship

Specifications

• Shape: Round
• Filter Material: Cotton gauze
• Flange Diameter: 2.0625 in.
• Outside Diameter: 3.5 in.
• Filter Height: 4 in.
• Flange Length: 0.875 in.
• Fitment Type: Universal clamp-on
• Recommended Cleaning Interval (automotive use): Approximately every 75,000 miles / 5 years under normal highway conditions

Included Components

• 1x K&N RA-0500 Universal Clamp-On Air Filter

Product Description

The K&N RA-0500 is a universal clamp-on air filter designed to fit directly onto a carburetor throat or intake neck rather than a single vehicle's factory air box. Its 2.0625 in. flange diameter and pliable rubber construction make it a flexible option across a wide range of equipment, from racing engines to small engines like generators, snowmobiles, and tractors.

Built from four layers of cotton gauze treated with K&N's tacking agent, the RA-0500 is engineered to trap contaminants while allowing strong airflow to the engine. The rubber flange is designed to absorb vibration for a secure hold and can stretch slightly to accommodate intake necks that fall between standard sizes, adding some flexibility for custom or non-standard applications.

This filter is a good fit for builders and enthusiasts working on carbureted engines, small equipment, or custom intake setups who need a compact, universal round filter rather than a factory-specific replacement. Because it's a clamp-on universal filter, confirm your intake neck's diameter matches the 2.0625 in. flange before ordering, and note that the recommended 75,000-mile cleaning interval applies to automotive use - smaller engines and equipment may require more frequent servicing depending on operating conditions.