BD Diesel Performance Differential Covers and Royal Purple Max Gear Lube

The BD Diesel Performance aluminum alloy differential covers for AAM 11.5″ and 9.25″ axles are more than just good looking! They are designed to sling a steady flow of lubricant over the ring gear to saturate the pinion gear with oil. Heavy duty Royal Purple ‘Max Gear’ lubricant runs cooler and works even more effectively […]