K&N RG-1002RD Universal Clamp-On Round Tapered Air Filter 3-4in Adj Flange 6in

Vehicle Fitment

• Universal Fit - Designed for performance vehicles, cold air intake systems, racing builds, and any application with a 3.00 in., 3.50 in., or 4.00 in. intake tube requiring a large clamp-on tapered air filter

Fitment Notes

• This filter features an adjustable triple-diameter rubber flange - compatible with 3.00 in. (76 mm), 3.50 in. (89 mm), and 4.00 in. (102 mm) intake tube outer diameters
• Rubber flange can be stretched up to 1/16 in. (1.5 mm) to further accommodate in-between sizes
• Features an inverted (open bottom) filter design - verify clearance and mounting orientation before purchasing
• Not a direct OEM replacement for a specific vehicle - confirm fitment by measuring your intake tube diameter

Features

• Multi-layer oiled cotton gauze media delivers up to 50% more airflow than standard paper filters
• Adjustable triple-diameter flange fits 3 in., 3.5 in., and 4 in. intake tubes in a single filter
• Round tapered (cone) design maximizes filter surface area for high-CFM airflow performance
• Ultra-strong molded pliable rubber flange absorbs vibration and provides a secure, leak-free attachment
• Washable and reusable - engineered to last the lifetime of your build or vehicle
• Pre-oiled and ready to install straight out of the box
• Made in the USA
• Backed by K&N's Limited Warranty

Specifications

• Shape: Round Tapered (Cone)
• Flange Type: Adjustable - 3 inside diameters: 3.00 in. (76 mm), 3.50 in. (89 mm), 4.00 in. (102 mm)
• Flange Length: 1.125 in. (29 mm)
• Base Outside Diameter: 6.00 in. (152 mm)
• Top Outside Diameter: 4.75 in. (121 mm)
• Height: 8.875 in. (225 mm)
• Filter Material: Multi-layer oiled cotton gauze
• Filter Color: Red
• Top Style: Inverted (Open Bottom)
• Filter Re-Oiling Amount: 2.47 oz (73 ml)

Included Components

• 1x K&N RG-1002RD Universal Clamp-On Round Tapered Air Filter

Product Description

The K&N RG-1002RD is a high-flow universal clamp-on round tapered air filter that stands out from standard units with its adjustable triple-diameter rubber flange - accommodating 3.00 in., 3.50 in., and 4.00 in. intake tube diameters in a single filter. This makes it an exceptionally versatile choice for custom builds, cold air intake systems, and performance applications where a precise flange match can be difficult. The tapered cone profile - 6 inches at the base tapering to 4.75 inches at the top over a nearly 9-inch height - delivers substantial cotton gauze surface area for high-CFM demand while maintaining excellent filtration efficiency.

The multi-layer oiled cotton gauze construction flows significantly more air than any paper element, translating to sharper throttle response and measurable horsepower gains. Its inverted filter design provides additional clearance flexibility in tight engine bay configurations. Washable and reusable, the RG-1002RD arrives pre-oiled and is ready to install out of the box. Made in the USA and backed by K&N's Limited Warranty, it is a long-term performance upgrade for any build requiring a large-format adjustable clamp-on filter.