GM LS1 4340 Forged Crank - 4.000 Stroke

The EAGLE GM LS1 4340 Forged Crank with 4.000 stroke is a premium crankshaft designed for high-performance LS1 engine builds, suitable for both street and track applications. This forged component is intended to replace the factory cast unit, serving as the structural foundation of your engine's bottom end and converting reciprocating piston motion into rotational power.

Constructed from 4340 steel, this crankshaft offers enhanced strength and fatigue resistance, making it capable of withstanding higher combustion pressures and more aggressive RPM ranges. The 4.000-inch stroke dimension is critical for LS1 displacement calculations and ensures compatibility with LS1-specific connecting rods and block configurations.

Engine builders and mechanics trust forged cranks like this EAGLE unit for their reliability, especially in turbocharged, supercharged, or nitrous-equipped LS1 platforms. This crankshaft is an excellent choice for those looking to enhance their engine's performance and durability under demanding conditions.