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The COMP Cams billet keyway timing set for Chevrolet 396–454 Big Block (.010" undersize) combines precision-machined steel billet gears with a prestretched, heat-treated double roller chain for bullet-proof durability. The 9-keyway crank sprocket delivers 2° incremental timing changes and up to 8° total adjustment, offering tunable timing control suited to aggressive street builds and race applications.
COMP Cams Billet Timing Set CB -.010in 9 Keyway Adjustable
