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250521-06 .010" UNDERSIZE Gear for ALIGN BORED ENGINES RCD Replacement Gear - Bottom
TYPICALLY FOR ENGINE BUILDERS
RCD Replacement .010" UNDERSIZE Bottom Gear for BB Chevy WHEN ENGINES ARE LINE BORED TOO MUCH
Bottom gear is keywayed dual 3/16" 250521-06 Undersize replacement
STANDARD IS 250521-05