Distributor Shaft Gear Chevy V8 w/.491 Shaft

The Distributor Shaft Gear Chevy V8 w/.491 Shaft by COMP CAMS is a precision-engineered distributor component designed for small-block and big-block Chevrolet V8 engines. Built for high-performance and stock-build applications alike, this gear synchronizes the ignition system's critical timing function with engine RPM, ensuring reliable spark delivery across all load conditions. Mechanics, engine builders, and performance enthusiasts rely on distributor gears for maintaining carburetor and fuel-injection timing accuracy, whether assembling a street engine, restoration project, or competition platform.

Manufactured from iron and finished with black melonized coating, this distributor shaft gear resists corrosion and wear under sustained engine operation. The 0.491-inch shaft diameter is the OEM specification for classic and late-model Chevy V8 blocks, ensuring drop-in fitment without modification. The melonized surface treatment hardens the gear teeth and shaft interface, reducing friction and extending gear life under continuous ignition demands. This precision component integrates directly with your distributor's internal drive mechanism, transferring camshaft rotation to the rotor at exact mechanical ratio to maintain spark timing integrity.

Engine builders and restoration specialists selecting a Distributor Shaft Gear Chevy V8 w/.491 Shaft should verify shaft diameter compatibility with their specific distributor housing before purchase. COMP CAMS' OEM-specification design ensures compatibility across both carbureted and fuel-injected V8 applications, from 265-cube small-blocks through 496-cube big-block platforms. Installation requires removal of the distributor and timing cover access; professional technicians recommend replacing the distributor shaft seal and O-ring during gear installation to prevent oil seepage. This gear is sold individually and is essential for any complete distributor rebuild or engine overhaul involving Chevy V8 architecture.