Eliminate oil loss and blow-by not the breather tube. Many high winding VW engines needed additional crankcase ventilator. Crankcase pressure caused by blow-by can result in oil loss and destroyed engines. Don't gamble with your off-road machine. Install a Crankcase Breather Kit. The addition of a Sand Seal pulley Kit and Crankcase Breather Kit result in a "sealed" engine. Using proper air cleaners, your engine will run clean and free of contaminates, even in the roughest of conditions, and terrain. Kit contains one filter box, hoses, clamps and fittings required for installation.