THIS TUNE UP KIT INCLUDES AN AIR AND PRE FILTER, OIL FILTER, FUEL FILTER AND ONE SPARK PLUG. THE AIR AND PRE FILTER REPLACE PART NUMBERS 20 083 02, 20 083 02-S, 20 083 06, 20 083 06-S, 20 083 03, 20 083 03-S AND 20 083 04-S. THE OIL FILTER REPLACES 12-050-01 AND 12-050-01-S, THE FUEL FILTER REPLACES 25 050 02, FITS 1/4" FUEL LINE. THE SPARK PLUG IS A CHAMPION 71G, RC12YC. FITS SV620, SV610, SV610S, SV601, SV600, SV600S, SV591, SV590, SV590S SV541, SV540, SV540S, SV530, SV530S, SV480, SV480S, SV471, SV470 AND SV470S SERIES ENGINES. Warning:Lead-Nickel-Cancer and Reproductive Harm