SBC 4340 Forged Compstar Crank 3.500 Stroke

The SBC 4340 Forged Compstar Crank 3.500 Stroke by Callies is a premium crankshaft engineered for serious small-block Chevy engine builders and performance enthusiasts. This forged steel component serves as the rotating foundation of any stroker motor, translating piston motion into usable power while handling extreme cylinder pressures and RPM loads. Whether you're assembling a street performance engine, bracket racing platform, or high-output marine application, a quality crankshaft is non-negotiable for reliability and longevity.

The 3.500-inch stroke dimension increases piston displacement compared to stock small-block specifications, allowing greater cubic-inch capacity and torque production without increasing engine bore size. Built from 4340 forged steel, this crankshaft exhibits superior fatigue resistance and impact strength compared to cast alternatives, critical for engines operating at elevated boost levels or sustained high RPM. The Compstar Comet design features internal balance technology, meaning counterweights are integrated into the crankshaft itself rather than requiring external balancing hardware—this streamlines assembly, reduces rotating mass, and simplifies installation into your engine block. The two-piece rear seal design accommodates modern sealing standards while maintaining compatibility with traditional small-block Chevy architecture.

This crankshaft is ideal for engine builders tackling stroker projects, drag racing applications, or any build requiring increased displacement and durability. It integrates directly into standard small-block Chevy engine blocks with appropriate rod and piston combinations matched to the 3.500-inch stroke. At 48 pounds, the forged construction provides the structural integrity demanded by forced-induction and nitrous systems while remaining lighter than many aftermarket alternatives. Callies is recognized throughout the performance industry for precision manufacturing and quality control, making this crankshaft a reliable foundation for engines designed to produce substantial horsepower and torque over extended service life.