RACE TESTED: The Official Air Filter of NASCAR. ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Performance Reusable Air Filter 3 Inch Air Filter K&N Universal Clamp-On Air Filter - High Performance Washable Filter RB-0700 Universal Clamp-on Filter K&n Washable Air Filter Unlike disposable paper filters which must be frequently replaced, K&N Air Filters are washable, reusable, and engineered to last for the life of your vehicle. High-Flow Original Universal Air Filter - 2-1/2"FLG, 3-1/2"OD, 4"H ; Flange Length, 0.625 in (16 mm) ; Flanges, 1 ; Flange Type, Centered ; Height, 4 in (102 mm ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. Join the millions of customers who have saved money and improved vehicle performance by upgrading to K&N filtration. HIGH QUALITY: Made in America. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. These versatile filters are constructed with ultra-strong molded pliable rubber flanges that absorb vibration and allow for secure attachment. Universal Air Filters & Wraps | Search by Dimension - K&N K&N Universal Clamp-on Air Filters are manufactured for a wide variety of applications and unique filtration needs. K&N universal air filters are washable and reusable. Air Filter Shape: Round. Air Filter Material: Cotton Gauze. Filter Re-Oiling Amount: 0.34 oz (10 ml WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.