MAHLE FluidPRO MCX-2HD Heavy-Duty Multi-Coolant Exchange SystemMAHLE FluidPRO MCX 2HD Heavy Duty Multi Coolant Exchange System The MAHLE FluidPRO MCX 2HD Heavy Duty Multi Coolant Exchange System is the OEM Heavy Duty Commercial version of the MCX 2, with all of the great features of having one machine for multiple coolants. It's easy to switch from one coolant type to another with multiple tanks large enough for OEM style coolant exchange servicing. Backed by the MAHLE name for superior quality, each MCX 2HD is