Kevin - Husqvarna really does not offer a sleeve hitch compatible with the model LGT2554 lawn tractor. The Husqvarna sleeve hitch is part #574 76 50-01, but this is designed for garden tractors with heavier frames and rear tires that are 23" or larger. As for the replacement blades for a YTH2554, you would need 3 of these: YTH2554 blades