Mag-Hytec Differential Cover GM #AA 14-11.5

Overall height 4 1/8". Fits Full floating Axel GMC / Chevrolet HD 2500 & 3500 2001 to present. Duramax 6.6L & Gas 8.1L. This cover is the correct cover for your 14 bolt-11.5 differential, even though there are only 12 holes. The top and bottom bolts have been removed for drain plug and temperature sending unit hole. Magnetic drain plug and anodized aluminum dipstick with magnetic insert. O-rings require no gaskets or sealant. Routine lube maintenance without removing the differential cover. 1/8" NPT temperature sender port. T-304 stainless steel hardware. Lube level reference plug. Finned aircraft aluminum housing. Requires allen key wrenches (included) for installation and service. Fits with most factory suspension systems and aftermarket anti-sway bars.