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A COMP Cams replacement shaft for Magnum/1621 Chrysler shaft rocker systems, identified as the service shaft that replaces the original used in the 1621 Chrysler 383–440 B/RB shaft rocker assembly. Use this shaft when refreshing or repairing the shaft‑mounted rocker system to restore proper spacing and secure mounting for big‑block Chrysler valve trains.
COMP Cams Magnum Rocker Shaft Chrysler
