This Briggs & Stratton Genuine Tune-up Kit is designed exclusively for Single Cylinder Tractor 10.5-13.5 Gross HP engines. This comprehensive kit contains: Pre-filter (272403S) Air filter cartridge (496894S) Spark plug (802592S) 4-cycle 30W oil 48oz Step-by-step tune-up instructions Briggs & Stratton Genuine Part Designed specifically for our engines and can save on costly repairs while maintaining valuable warranty coverage.