Description: Part # 272490 is an aftermarket replacement air filter pre-cleaner for use with Briggs & Stratton 16HP OHV Vanguard pressure washer engines. When used in conjunction with the 394018 air filter (also available at Power Cleaning Systems), the pre-cleaner works to remove a percentage of dirt and other contaminants before reaching the air filter, automatically ejecting them through the exhaust system. This process helps to extend the life of your air filter, and ultimately support the overall performance of your pressure washer engine.