1217230620 121723-0620 1-21723062-0 Ex300-5 6Sd1T Oil Radiator Core For Isuzu The product with part number 1217230620, 121723-0620, 1-21723062-0 is an oil radiator core designed for the Isuzu Ex300-5 model with a 6Sd1T engine. This radiator core is crucial for maintaining optimal temperatures within the engine system, ensuring efficient cooling and performance.