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1973-1974 GMC C25/C2500 Suburban 5.7L V8 GAS. Piston Material: Hypereutectic. 1971-1972 GMC C25/C2500 Suburban 5.7L V8. Piston skirts protected by next-gen DUROSHIELD coating. Made w/exclusive FM425 material for excellent strength & scuff resistance - allows tighter bore and improves sealing for less blow-by.





