K&N High-Flow Clamp-On Air Filter RU-3130 — 3.5in Flange, 7in Tapered Cone, Washable Reusable

K&N RU-3130 is a washable, reusable high-flow clamp-on air filter engineered to boost airflow and last the life of your vehicle.

Built for universal applications, the K&N High-Flow Original Clamp-On Air Filter (RU-3130) uses layered cotton gauze media and a flexible molded rubber flange to deliver improved air intake while resisting vibration and wear. This tapered, cone-style filter fits a 3.5 inch flange diameter with a 0.875 inch flange length and stands 7 inches tall, making it suitable for many aftermarket and custom installations where a clamp-on solution is preferred.

How does this filter improve engine airflow and performance?

The RU-3130 increases the volume of air reaching the engine by using multiple layers of specially treated cotton gauze that combine high flow with effective filtration. Greater airflow can support better throttle response and help the engine breathe more easily under load, without sacrificing contaminant protection.

• Multi-layer cotton gauze media for balanced flow and filtration
• Pre-oiled from the factory to ensure immediate performance
• Engineered to support increased horsepower and acceleration potential

How often will I need to service and reuse this clamp-on filter?

K&N filters are designed to be washable and reusable, significantly extending service intervals compared with disposable paper filters. Under normal highway driving, cleaning is typically recommended about every 75,000 miles, though frequency depends on environment and driving conditions.

• Washable and re-oilable construction for repeated use
• Suggested cleaning interval: roughly every 75,000 miles in standard highway use
• Simple cleaning kits and instructions available to restore performance

Will this clamp-on filter fit my setup and how easy is installation?

The RU-3130 is a universal clamp-on style with a 3.5 inch flange diameter and pliable rubber flange that adapts to a variety of intakes, air boxes, or cold-air tube projects. Installations are straightforward: slide the flange onto the intake pipe and secure with a clamp—no special tools or modifications are usually necessary.

• Flange diameter: 3.5 inches; flange length: 0.875 inches
• Flexible molded rubber flange absorbs vibration for a secure seal
• Compatible with many round tapered (cone) intake applications

What are the construction features and warranty coverage?

The RU-3130 is built from premium materials and manufactured to last, featuring multiple layers of cotton gauze treated with a tackifier to trap contaminants and durable molded rubber components. K&N backs its craftsmanship with a 1-year limited warranty and manufactures this filter in the USA.

• Four layers of cotton gauze filtration with specially designed tack agent
• Durable, long-lasting molded rubber flange and robust construction
• 1-year limited warranty and American-made manufacturing

Who is this for: The K&N RU-3130 clamp-on air filter is ideal for car enthusiasts, mechanics working on custom intakes, and vehicle owners seeking a washable, long-lasting alternative to disposable paper filters. It suits those who want a universal cone-style filter that improves airflow, reduces recurring filter purchases, and fits a wide range of applications where a 3.5 inch flange and 7 inch height are appropriate.