This engine tune-up kit will help to keep your Gravely zero-turn performing at industry leading levels by completing routine maintenance using factory authorized parts. • Included in this kit are two bottles of SAE 10w40 oil, one oil filter, two spark plugs, one inner and outer air filter, and one fuel filter • This kit is made for use on select Gravely ZT X, ZT XL, ZT HD, PRO-TURN, and PRO-STANCE models with Kawasaki engines