Crane Hi Clearance Dana 35 diff cover. Features: smooth lipless design to prevent hanging up on rocks. Fill hole located for correct oil levels without dip sticks or risk of overfilling. Recessed design helps prevent damaged to bolt heads. Bolts are grade 8, 12 point counterbore style to allow correct torque and look good too, and are included with every cover. Hi Grade RTV sealant is included also. Sealing surface is machined flat to insure correct sealing. CHC D35C covers are cast from Hi Strength Ductile Iron. All Crane products carry a lifetime free replacement warranty against breakage. Recomended for serious off road use only.