NAPA Air Dryer Filter 4374Part No. 4374 Type AIR DRYER Brand NAPGLD Unit of Measure EACH Description NAPA Air Dryer Filter Warranty Service Interval Thread M39 x 1. 5 Type Spin On Height 165mm Outer Diameter Top 140mm 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 exceptional qualities of a standard