Mitsubishi 4DQ3 piston ring kit std (for tractors with 4 ring piston) Mitsubishi 4DQ3 piston ring kit std $67.43 Enter Quantity SKU: W-8133-RS-4DQ3STD 4 ring Fits: Mitsubishi tractors: D3250, D3000, MT2801D, MT4201, ST3000, MT3201