This foam element air filter provides superior protection against the destructive effects of dirt ingestion. Used on select 3.5 to 4.5 hp Q45, Classic, Sprint and Quattro engines with plastic air cleaner housing and 450 to 600 Series 4.5 Gross Torque engines, this OEM part ensures proper fit and performance to maintain the life of your BRIGGS & STRATTON engine. Parts are specially designed to exact OEM standards, manufactured and tested to help deliver optimum performance in BRIGGS & STRATTON engines. Not only are BRIGGS & STRATTON genuine parts guaranteed to fit, but using them ensures that the BRIGGS & STRATTON engine they are installed on complies with applicable (EPA) emission regulations.