K&N Engineering RU-5040 Universal Clamp-On Air Filter, 3.5-Inch Flange ID

K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable. Regardless of the angle or offset diameter of an air intake, there is probably a K&N Universal air filter for your equipment. K&N universal air filters are washable and reusable. Associated products: 99-5000 Filter Care Service Kit Aerosol

• NO-HASSLE WARRANTY: 1-Year Limited Warranty

The K&N Engineering RU-5040 Universal Clamp-On Air Filter is designed for a wide range of automotive, powersports, racing, equipment, and recreational applications. Its universal configuration accommodates air intakes with varying angles and offset diameters, making it a practical replacement or upgrade for compatible intake systems. The filter’s molded rubber flange provides a secure connection while helping absorb engine and equipment vibration.

Built for repeated use, the K&N RU-5040 features a washable and reusable filter element that can reduce replacement frequency when properly maintained. The pliable rubber flange can stretch slightly to help accommodate in-between intake sizes, supporting a flexible installation where exact sizing may not be available. This filter is suitable for applications such as racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other equipment using a compatible clamp-on intake.

Key specifications and technical data:

• Brand: K&N Engineering
• Part Number: RU-5040
• Product Type: Universal clamp-on air filter
• Flange Inside Diameter: 3.5 inches
• Base Outside Diameter: 8.5 inches
• Top Outside Diameter: 6.25 inches
• Filter Height: 5.5 inches
• Serviceable Design: Washable and reusable

What's included: One K&N Engineering RU-5040 Universal Clamp-On Air Filter. A K&N 99-5000 Filter Care Service Kit Aerosol is available separately for cleaning and maintaining the filter. This product is not CARB approved and may require acknowledgment of applicable emissions restrictions before purchase or installation. Verify intake compatibility and local emissions requirements before use. Fitment is application-specific; confirm the intake flange size, available clearance, and installation angle for the intended vehicle or equipment.

The K&N RU-5040 is covered by a 1-year limited warranty. It is intended for compatible applications where a universal clamp-on air filter is required and should be installed according to the equipment manufacturer’s recommendations.

Features:

• Universal Compatibility: Designed for a variety of vehicles, equipment, racing applications, generators, snowmobiles, tractors, and other compatible intake systems.
• Washable and Reusable: Serviceable filter construction allows cleaning and reuse with proper maintenance.
• Flexible Rubber Flange: Molded pliable rubber absorbs vibration and can stretch slightly to help accommodate in-between intake sizes.
• Secure Clamp-On Installation: The 3.5-inch flange inside diameter supports a firm connection to compatible air intake tubing.

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1