Kubota Z1300 piston rings std – 90mm bore size Kubota Z1300 piston rings std – 90mm bore size $84.10 Enter Quantity SKU: W-3133-15121-21053 Replaces: 15121-21053Fits: Kubota tractors: L240, L260Note #1: Kubota Z1300 engine model #: - 90MM bore size