SBC 4340 Forged Magnum Crank - 3.875 Stroke

The SBC 4340 Forged Magnum Crank - 3.875 Stroke is a high-performance crankshaft designed for serious small-block Chevy enthusiasts and racers. Manufactured by Callies, a leader in forged rotating assemblies, this crankshaft is built for reliability under extreme loads and high RPMs. It serves as a critical component for both street performance engines and competitive racing platforms.

Constructed from 4340 steel, this crankshaft offers exceptional torsional strength and fatigue resistance, which are essential for handling peak cylinder pressures and rapid acceleration. The 3.875-inch stroke enhances engine displacement, improving torque production while remaining compatible with standard SBC block dimensions. The Magnum designation signifies optimized journal sizing and metallurgical treatments that enhance durability in forced induction applications.

Engine builders, mechanical shops, and DIY enthusiasts will find this crankshaft ideal for upgrading existing SBC platforms. Its precision manufacturing ensures smooth operation and minimizes vibration when balanced with the appropriate piston and rod combination. This crankshaft is a reliable choice for those looking to maximize performance in turbocharged, supercharged, or nitrous-fed engines.