DOP5129B Q45, Classic, Sprint, Quattro, 3.5-4.75 Gross HP Tune Up Kit No. 5129. This is a Briggs and Stratton tune up kit for engines with plastic air cleaner housings that includes: 18oz 30W Oil (100005), Fuel Treatment and Stabilizer (100120), Foam Air Filter (799579), Standard Air Filter (798452) and Spark Plug (802592S).