To keep heat from damaging our new ARB Air Locker, we tossed on this massive differential cover from ATS. The new cover allows for more fluid, a drain plug, and even a temp port in case we get curious just how hot our 10.5-inch axle gets. With the differentials set in place, we plumbed the air lines for the ARBs. We sleeved each one of the air lines using clear shielding tube to add a little air-line protection. This stuff can be picked up at most home improvement stores.