YOU ARE BUYING A NEW TUNE UP KIT, IT INCLUDES AN AIR FILTER, PRE FILTER, OIL FILTER, FUEL FILTER AND TWO SPARK PLUGS. THE INNER AIR FILTER REPLACES11013-7019, 11013-7045 AND 11013-7044. SPECS: ID: 1 25/32" OD: 2 13/32" HEIGHT: 10 5/16". THE OUTER FILTER REPLACES 11013-7020. SPECS: ID: 2 1/2" OD: 4 1/8" HEIGHT: 10 3/4". THE OIL FILTER REPLACES 49065-2076, 49065-2077, 49065-7002 AND 49065-7007. SPECS: THREAD SIZE: 3/4"- 16 OD: 3" HEIGHT: 2 1/4" MICRON: 28. FUEL FILTER SPECS: MICRON: 23-28, COMPATIBLE WITH GREATER THAN 10% ETHANOL FUEL, FITS 1/4" AND 5/16" ID FUEL LINE. AND THE SPARK PLUGS REPLACE 92070-2112, 92070-7004 AND BPR4ES. KIT FITS MODELS: FD750D, FD791D, FH601D, FH641D, FH680D, FH721D, FH601V-FH721V, FH770D, FX651V, FX691V, FX730V, FX1000V, FH601D, FH641D, FH680D, FH721D, FX651V, FX691V, FX730V; FOR 25 HP ENGINES, FB460V, FC420V, FC540V, FD501D, FD590V, FR651V, FR691V, FR730V, FX481V, FX541V FX600V, FX651V, FX691V AND FX730V. Warning:Lead-Nickel-Cancer and Reproductive Harm