Overall height 4 1/8". Fits most Full floating Axle GM 1973 to present 2500 & 3500 Full Floating Axle . Ring gear on passengers side of center. 6 Liter Gas 2500 HD. 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.