K&N RC-4580 Universal Round Tapered High-Flow Air Filter 4" ID

Vehicle Fitment

• Universal fit - not vehicle specific
• Designed to fit many air intake systems with 4" flange inlet

Features

• Universal round tapered air filter by K&N
• Washable and reusable high-flow cotton gauze media
• Molded pliable rubber flange for secure clamp-on fit
• Increases horsepower and acceleration by improving airflow
• Chrome-finished metal top for durability and style
• Simple clamp-on installation - no special tools needed
• Helps extend engine life by filtering contaminants effectively
• Designed for performance and everyday use
• Durable construction for long service life

Specifications

• Part Number: RC-4580
• Filter Shape: Round tapered
• Flange Inside Diameter: 4" (102 mm)
• Top Outside Diameter: 4.5" (114 mm)
• Base Outside Diameter: 5.375" (137 mm)
• Height: 8" (203 mm)
• Filter Media: Oiled cotton gauze
• Flange Type: Centered, pliable rubber
• Weight: ~0.9 lb
• Warranty: Limited 1-year warranty

Included Components

• 1x Universal round tapered high-flow air filter

Product Description

The K&N RC-4580 Universal Round Tapered High-Flow Air Filter is a versatile performance air filter designed for a wide range of applications where a 4" inlet filter is needed. Its universal design means it's not specific to any single car, truck, powersports vehicle, or piece of equipment - instead, it fits many aftermarket or custom intake setups with a 4" diameter flange. This filter uses premium oiled cotton gauze media that improves airflow while still capturing harmful contaminants, helping maintain engine performance and efficiency.

Installing the RC-4580 is quick and simple: clamp it onto your intake tube with a standard hose clamp (not included), and you're ready to go. Because it's washable and reusable, this filter can be cleaned and re-oiled instead of replaced, offering long-term value and reducing waste. Its chrome-finished top and robust construction also make it a durable choice for performance builds, custom projects, and many other uses where a universal high-flow air filter is needed.