K&N Replacement Filter For RK Series High Flow Air Charger Intake Kit Features Constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 (1.5mm) to fit in-between sizes K&N universal air filters are washable and reusable Base Outside Length: 4.5 in (114 mm) Base Outside Width: 3.75 in (95 mm) Flange Inside Diameter: 2.438 in (62 mm) Flange Length: 0.625 in (16 mm) Flange Type: Centered Height: 6 in (152 mm) Top Outside Length: 3.5 in (89 mm) Top Outside Width: 2.5 in (64 mm) Top Style: Metal Top Material/Finish: Black Powder Coated Filter Material: Cotton Gauze