tune up maintenance service kit filters for cub cadet ltx1050 rzt50 rzt54 prayters parts please make sure this is the correct air filter for your mower. the cub cadet rzt50 mower came with 4 different air filters and different engines depending on the year. if you can double check it will help. if you have the engine model number and model number off the mower, or any part numbers for the filters this will help also. feel free to double check with us by sending a message. i will make sure you get all the right parts. thank you. tune up filter kit for the cub cadet ltx1050 rzt50 rzt54 lawn mowers. the kit comes with a new air filter (km-11013-7049), pre filter, oil filter (km-49065-7007), fuel filter, and 2 ngk bpr4es spark plugs.