Eagle Buick 3.8L V6 3.400in Stroke Forged 4340 Steel Crank External Balance Crankshaft

This is an Eagle forged 4340 steel crankshaft specifically for Buick 3.8L V6 engines. It features a 3.400-inch stroke and is designed for external balance, making it a solid choice for engine rebuilds or performance builds where increased displacement and strength are needed. The 4340 steel construction offers a significant upgrade in durability over stock cast iron cranks, handling higher cylinder pressures and RPMs.

Forged from 4340 steel, this crankshaft is built to withstand the demands of a performance engine. The forging process creates a stronger, more consistent grain structure compared to cast components, reducing the risk of failure under stress. Its 3.400-inch stroke increases the engine's displacement, which can lead to improved torque and horsepower when paired with appropriate supporting modifications. The external balance design means it relies on balance weights (not included) to achieve proper rotation, a common setup for many V6 applications that allows for fine-tuning of the engine's balance.

When rebuilding your 3.8L V6, a forged crankshaft like this Eagle unit is a critical component for reliability and performance. Ensure you have the correct balance weights and all necessary bearings and seals for installation. Consult your engine's service manual for precise balancing procedures and assembly specifications.