K&N Filters Universal Clamp-On Air Filter – Round Tapered (KNNRU-5181)

The K&N Filters Universal Clamp-On Air Filter – Round Tapered (KNNRU-5181) is designed to improve airflow and engine performance for a wide range of vehicles. Built with high-flow cotton gauze media, this washable and reusable filter is ideal for high-performance applications. Its tapered conical shape and 4-inch flange allow for flexible fitment and maximum filtration. Whether you’re building a custom intake or replacing a worn filter, this K&N universal air filter delivers consistent, long-lasting performance.

Features and Specifications:

• Flange Inside Diameter: 4.125 in (105 mm)
• Base Outside Diameter: 7.375 in (187 mm)
• Top Outside Diameter: 7 in (178 mm)
• Height: 11.5 in (292 mm)
• Air Filter Material: Cotton Gauze
• Air Filter Shape: Round-Tapered
• Top Material: Rubber
• Engineered Power: State-of-the-art air filter media boosts horsepower and acceleration while enhancing overall engine performance.
• Rugged Construction: Made from durable, premium materials and advanced construction methods for long-lasting performance.
• 6 Layers of Protection: Premium cotton gauze treated with a specialized tacking agent blocks and traps harmful contaminants.
• Low Maintenance: Clean every 75,000 miles (5 years) under normal highway driving conditions.
• Reusable Design: Replacing disposable filters with washable, reusable air filters saves up to $125 over 200,000 miles.
• Ultimate Longevity: Lifetime limited warranty on stock replacement filters (limitations apply).
• Easy Installation: Pre-oiled and ready for quick, hassle-free installation into the factory air box.
• Reduces Waste: This helps reduce landfill waste by eliminating the need for disposable air filters and packaging.
• Warranty: 1 Year Limited