NAPA Air Filter 6438Part No. 6438 Type AIR FILTER Brand NAPGLD Unit of Measure EACH Description NAPA Air Filter Warranty Service Interval Type Round Height 276. 2mm Inner Diameter Bottom 59. 9mm Outer Diameter Bottom 105. 7mm Outer Diameter Top 105. 7mm Features A Nationwide NAPA Warranty backs this Air Filter Prevents microscopic dust particles from damaging Cylinder walls, Pistons and Piston Rings, which could damage an Engine's performance. NAPA Air Filters combine