JP Performance Double Roller Timing Chain - 66 Link - GN VI Big Block Chevy DEW32-6139022A New valve springs with larger

New valve springs with larger diameters require new retainers to handle the higher pressures developed by the springs

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JP Performance Double Roller Timing Chain - 66 Link - GN VI Big Block Chevy DEW32-6139022A New valve springs with largerProduct Description: Timing Chain Double Roller 66 Link Steel Gen VI Big Block Chevy JP Performance Products hardens all crank sprockets for all chain sets, crank gears for full steel timing gear sets and oil pump drive gears. Induction hardening is used to improve tooth life of gears and sprockets as well as pre work hardening gears and sprockets before they are installed onto engines. Induction hardening is a process where steel is hardened by means