K&N RU-3135HBK Dryflow Black Round Tapered Air Filter 5in Flange 6.5in OD 7in H

Vehicle Fitment

• Universal Fit - Designed for performance vehicles, cold air intake systems, racing builds, and any application with a 5.00 in. intake tube requiring a large oil-free 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 5.00 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
• Oil-free Dryflow design - requires K&N Synthetic Air Filter Cleaner for servicing (sold separately); do not use standard K&N oil-based Recharger kit
• Not a direct OEM replacement for a specific vehicle - confirm fitment by measuring your intake tube diameter

Features

• K&N Dryflow oil-free synthetic media - no filter oil required, no mess, no risk of MAF sensor contamination
• Black Series colorway - stealthy black filter body for a clean, aggressive engine bay appearance
• Large round tapered (cone) design provides exceptional filter surface area for high-CFM airflow demands
• Ultra-strong molded pliable rubber flange absorbs vibration and provides a secure, leak-free attachment
• Washable and reusable - requires cleaning only every 50,000 miles under normal conditions
• Low-restriction design delivers strong airflow without the need for oiling
• Made in the USA
• Backed by K&N's Lifetime Limited Warranty

Specifications

• Series: K&N Black Series / Dryflow
• Shape: Round Tapered (Cone)
• Flange Inside Diameter: 5.00 in. (127 mm)
• Flange Length: 1.00 in. (25 mm)
• Flange Type: Centered (Single)
• Base Outside Diameter: 6.50 in. (165 mm)
• Top Outside Diameter: 4.375 in. (111 mm)
• Height: 7.00 in. (178 mm)
• Filter Media: Dry synthetic (Dryflow) - oil-free
• Filter Color: Black
• Top Style: Rubber End Cap
• Inner Wire: No

Included Components

• 1x K&N RU-3135HBK Dryflow Black Series Universal Clamp-On Round Tapered Air Filter

Product Description

The K&N RU-3135HBK is part of K&N's Black Series lineup, featuring the company's Dryflow oil-free synthetic filter media in a large-format round tapered cone. Unlike traditional K&N cotton gauze filters that require periodic oiling, the Dryflow design delivers high airflow performance with zero filter oil - eliminating the risk of MAF sensor contamination and simplifying maintenance. Its tapered cone profile - 6.50 inches at the base narrowing to 4.375 inches at the top over a 7-inch height - delivers substantial dry synthetic filter surface area to support demanding 5-inch intake flows while maintaining excellent filtration efficiency.

The centered 5.00 in. rubber flange mounts securely onto matching intake tubes, absorbs vibration, and can be stretched slightly to fit in-between sizes. When cleaning is needed (every 50,000 miles), simply wash with K&N's Synthetic Air Filter Cleaner - no re-oiling required. The black filter body gives it a premium stealth appearance in any engine bay. Made in the USA and backed by K&N's Lifetime Limited Warranty, the RU-3135HBK is the right choice for high-performance builds requiring a large, oil-free clamp-on filter with a 5-inch inlet.