K&N RU-4950 Universal Clamp-On Round Tapered Air Filter 2.5in Flange 6in OD 5.5H

Vehicle Fitment

• Universal Fit - Designed for performance vehicles, cold air intake systems, racing builds, and any application with a 2.50 in. intake tube requiring a wide-body clamp-on tapered air filter

Fitment Notes

• This is a universal clamp-on filter - verify your intake tube outside diameter matches the flange inside diameter of 2.50 in. before purchasing
• Rubber flange can be stretched up to 1/16 in. (1.5 mm) to accommodate in-between sizes or angled intake configurations
• Note: despite the small 2.5-inch flange, this filter has a wide 6-inch base OD - verify engine bay clearance 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
• Wide-body round tapered design - 6-inch base maximizes filter surface area despite the compact 2.5-inch inlet
• 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
• Rubber top end cap for a clean, secure finish
• Made in the USA
• Backed by K&N's 10-Year/Million Mile Limited Warranty

Specifications

• Shape: Round Tapered (Cone)
• Flange Inside Diameter: 2.50 in. (64 mm)
• Flange Length: 2.00 in. (51 mm)
• Flange Type: Centered (Single)
• Base Outside Diameter: 6.00 in. (152 mm)
• Top Outside Diameter: 5.00 in. (127 mm)
• Height: 5.50 in. (140 mm)
• Filter Material: Multi-layer oiled cotton gauze
• Filter Re-Oiling Amount: 1.06 oz (31 ml)
• Filter Color: Red
• Top Style: Rubber End Cap
• Inner Wire: No
• Weight: 1.30 lb (0.6 kg)

Included Components

• 1x K&N RU-4950 Universal Clamp-On Round Tapered Air Filter

Product Description

The K&N RU-4950 is a high-flow universal clamp-on round tapered air filter with a wide-body design relative to its 2.5-inch inlet - a 6-inch base diameter tapering to 5 inches at the top over a compact 5.5-inch height delivers a large cotton gauze surface area for a small flange intake. This geometry makes it well-suited for performance cold air intakes and custom builds where maximum filter area is needed through a smaller 2.5-inch tube. The multi-layer oiled cotton gauze construction flows significantly more air than any paper element, translating to sharper throttle response and measurable horsepower gains.

The centered 2.50 in. rubber flange mounts securely onto matching intake tubes, absorbs vibration, and can be stretched slightly to fit in-between sizes. Washable and reusable, the RU-4950 arrives pre-oiled and is ready to install out of the box. It is backed by K&N's 10-Year/Million Mile Limited Warranty and made in the USA - making it a reliable, long-term upgrade for any performance application requiring a wide-diameter filter element on a compact 2.5-inch intake tube.