... is allowed 3. high speed steel 4. Komatsu, Hino, Isuzu, Mitsubishi Diesel Engine Nozzle1. P, S, DNS and DNP series2. ... OEM is allowed3. high speed steel4. Komatsu, Hino, Isuzu, Mitsubishi ... heads, cylinder blocks, cylinder liners, pistons, piston rings, engine valves, engine bearings, oil nozzles, oil seals, oil pumps, fuel pumps, water ...