K&N Engineering RU-3870 Universal Clamp-On Air Filter, 3-Inch Flange

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: 25-3900 Air Filter Foam Wrap, 99-5000 Filter Care Service Kit Aerosol

• NO-HASSLE WARRANTY: 1-Year Limited Warranty
• One Year Limited Warranty

The K&N Engineering RU-3870 Universal Clamp-On Air Filter is designed for a wide range of automotive, racing, powersports, equipment, and other custom air-intake applications. Its universal design accommodates air-intake systems with angled or offset inlet configurations, making it a practical choice for applications where a vehicle-specific replacement filter is not available.

Constructed with a strong, pliable molded rubber flange, the K&N RU-3870 helps absorb vibration while providing a secure connection to the intake tube. The flexible flange can stretch slightly to accommodate minor variations between sizes, supporting a reliable fit across compatible intake assemblies. Its reusable filter media can be cleaned and serviced instead of routinely replaced, helping simplify long-term maintenance when used with the appropriate K&N filter care products.

Brief Description: Universal clamp-on air filter for compatible 3-inch air-intake applications, featuring a flexible rubber flange and washable, reusable construction.

Key Product Specifications & Technical Data:

• Brand: K&N Engineering
• Part Number: RU-3870
• Product Type: Universal automotive air filter
• Inlet Flange: 3 inches
• Base Diameter: 5 inches
• Top Diameter: 4-1/2 inches
• Overall Height: 5 inches
• Service Type: Washable and reusable

What's Included: One K&N Engineering RU-3870 universal clamp-on air filter. Recommended associated products include the K&N 25-3900 Air Filter Foam Wrap and 99-5000 Filter Care Service Kit Aerosol.

This product is not CARB approved and may require acknowledgment of applicable emissions restrictions before purchase or installation. Confirm air-intake tube size, clearance, flange orientation, and application requirements before ordering. Fitment data should be verified against the vehicle or equipment manufacturer's specifications when available. Backed by a K&N one-year limited warranty.

Features:

• Universal Compatibility: Designed for a wide range of automotive, racing, powersports, generator, tractor, snowmobile, and custom air-intake applications.
• Flexible Rubber Flange: Molded pliable rubber helps absorb vibration, maintain a secure attachment, and accommodate minor size variations.
• Washable and Reusable: Cleanable filter construction supports repeated service and reduces the need for frequent replacement filters.
• Application Flexibility: Suitable for compatible angled or offset air-intake configurations where a universal clamp-on filter is required.

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