Direction-Plus™ Universal ProVent® oil separator PV201DPK kit comes with bracket and hoses. It protects your diesel engine by substantially reducing the amount of oil entering the engine from blow-by gas in the crankcase ventilation system. Direction-Plus™ ProVent® systems are specifically designed to separate and redirect oil and air from blow-by gas produced from within the crank case. It also provide the option of returning the oil back to the sump. By not fitting a Direction-Plus™ ProVent® system it is likely that your engine will experience a progressive reduction in performance.