THIS IS A REPLACEMENT MAINTENANCE TUNE UP KIT. IT INCLUDES AN AIR FILTER WITH PRE-FILTER, FUEL FILTER, OIL FILTER AND TWO SPARK PLUGS. THE AIR AND PRE FILTER REPLACE PART NUMBERS 792105, GY21057, MIU11515 AND MIU11517. THE FUEL FILTER REPLACES 691035, AM116304 AND GY20709. THE OIL FILTER REPLACES GY20577, AM125424, LG492932S, 696854 AND THE SPARK PLUGS REPLACE M78543 AND RC12YC. FITS LA165, LA175, D160, D170 AND Z245, 24 AND 26HP ENGINES. Warning:Lead-Nickel-Cancer and Reproductive Harm