K&N RG-1002RD-L Chrome Round Tapered Universal Air Filter, Adjustable Flange

Vehicle Fitment

• Universal - not vehicle-specific; suited for racing vehicles, motorcycles, off-road applications, generators, snowmobiles, and tractors

Fitment Notes

• Adjustable flange design includes inserts to fit three different inside flange diameters: 4 in., 3.5 in., and 3 in., allowing this single filter to fit a range of intake necks
• Not a direct factory drop-in for any specific make or model - confirm intake neck diameter falls within the 3-4 in. adjustable range before ordering
• "-L" designation indicates multi-language retail packaging; the filter itself is identical to the standard RG-1002RD

Features

• Inverted filter top design provides a larger surface area than comparably sized filters, increasing airflow
• Includes flange inserts to adjust and fit three different mounting diameters
• Layered cotton gauze filter media designed for easy cleaning and long-term reusability
• Ultra-strong molded pliable rubber flange absorbs vibration for a secure attachment
• High airflow with excellent filtration, designed to increase horsepower and acceleration
• Chrome cap finish for a distinctive, high-performance appearance
• Pre-oiled and ready to install straight from the factory
• Clamp-on, washable, and reusable design
• Warrantied for unlimited miles over a 1-year period

Specifications

• Shape: Conical / Round Tapered
• Filter Material: Cotton gauze
• Filter Color: Red
• Cap Finish: Chrome
• Outside Diameter: 6.00 in.
• Inside Diameter (adjustable): 4 in. / 3.5 in. / 3 in. via included inserts
• Overall Height: 9.50 in.
• Fitment Type: Universal clamp-on, adjustable flange
• Packaging: Multi-language box

Included Components

• 1x K&N RG-1002RD-L Round Tapered Universal Air Filter
• Flange Inserts for 4 in., 3.5 in., and 3 in. mounting diameters

Product Description

The K&N RG-1002RD-L is a large, conical universal air filter built around an adjustable mounting flange, letting a single filter accommodate intake necks of 3 in., 3.5 in., or 4 in. using the included inserts. This flexibility makes it a popular choice for racing builds, motorcycles, and custom intake setups where matching a filter to an unusual or non-standard flange size can otherwise be a challenge.

The filter uses layered cotton gauze media designed for easy cleaning and long-term reuse, paired with an inverted top design that increases usable surface area compared to similarly sized filters. This larger surface area is intended to support stronger airflow and a resulting boost in horsepower and acceleration, while the chrome cap gives it a finished, performance-oriented look under the hood.

This filter suits builders and enthusiasts working on custom carbureted or throttle-body intake setups who want flange flexibility without needing to special-order an exact-diameter filter. The "-L" designation simply reflects multi-language retail packaging - the filter itself is the same as K&N's standard RG-1002RD. As with any universal clamp-on filter, confirm your intake neck falls within the 3-4 in. adjustable range before ordering.