Napa Air Filter 6818Part No. 6818 Type AIR FILTER Brand NAPGLD Unit of Measure EACH Description Napa Air Filter Warranty Service Interval Type Round Height 376mm Inner Diameter Bottom 94mm Outer Diameter Bottom 159mm Outer Diameter Top 159mm 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 all the