Eagle Ford 351W 4.000in Crank 6.200in I-Beam Rods -15.8cc 4.030in Pistons Rotating Assembly

Forged from high-strength 4340 steel, the crankshaft in this Eagle rotating assembly features a 4.000-inch stroke, giving your Ford 351W engine a significant displacement increase. This robust crank is paired with 6.200-inch long I-beam connecting rods, also forged from 4340 steel. The longer rod length helps reduce side loading on the pistons and cylinder walls, contributing to improved engine longevity and potentially better ring seal. The assembly includes pistons designed for a 4.030-inch bore with a -15.8cc dish, which is crucial for achieving your desired compression ratio depending on your cylinder head volume.

This rotating assembly is built for serious performance builds where strength and reliability are paramount. The I-beam connecting rods are well-suited for naturally aspirated or moderate forced induction applications, offering a solid balance of strength and weight. The 4340 steel construction throughout the crank and rods means these components can handle the increased stresses of higher horsepower and torque output compared to stock cast components. Eagle has a well-known reputation for producing durable engine internals, and this assembly is a testament to that.

When building a high-performance engine, a balanced rotating assembly is key. While this assembly is balanced internally by Eagle, we always recommend having it professionally balanced with your specific torque converter or flywheel and clutch assembly for optimal engine smoothness and longevity. This assembly is designed for performance street or strip applications. Please note that this assembly is not CARB approved and cannot be shipped to California.