THIS TUNE UP KIT INCLUDES AN AIR FILTER WITH PRE FILTER, OIL FILTER, FUEL FILTER AND A SPARK PLUG. THE AIR AND PRE FILTER REPLACE PART NUMBERS AM121608, GY20574, M92359 AND M92360. AIR FILTER ID: 3-3/8" OD: 4-1/2" HEIGHT: 2-13/16"....