The Mahle MCX series machines provide the quickest, most complete system for switching from one coolant type to another. This is the first machine to address modern coolant service needs. Fast - it exchanges coolant in most vehicles in 1-3 minutes! Provides the industry's best exchange efficiency, and removes contamination and particulates from the engine block, water core, water pump, hoses and radiator. Connection and operation are simple - absolutely no hose cutting! The MCX-2HD is designed for heavy duty trucks, and also features system pressure test and hot radiator cap pressure relief. Speed your coolant service and increase your profits with the MCX-2HD.