K&N Tower Base Covered Crankcase Vent Filter with Multi-Hose Vents - High Performance Racing Style - Designed for big bore and full race VW and other like-size engines that require high levels of crankcase breathing filtration. Tower design saves blow-by oil while relieving crankcase pressure. High capacity filter element stops dirt from reaching oil supply when decelerating. Note: Legal in California only for racing vehicles which may never be used, registered, or licensed for use upon a highway. See knfilters.com for CARB status on each part for a specific vehicle.