Coan - Main Shaft 300M Alloy W/Rolled Splines

The Coan Main Shaft 300M Alloy with Rolled Splines is engineered for high-performance applications, offering exceptional strength and durability. Crafted from premium 300M alloy steel, this main shaft is designed to withstand extreme torque loads, making it ideal for both racing and heavy-duty use. The rolled spline design enhances the shaft's structural integrity, reducing stress concentrations and minimizing the risk of fatigue or failure under high-power conditions. Compatible with Turbo Hydramatic 400 (TH400) and 4L80E transmissions, this main shaft serves as a direct replacement for OEM shafts, requiring no modifications for installation. Whether you're building a high-horsepower street car or a competitive drag racer, the Coan Main Shaft 300M Alloy with Rolled Splines delivers reliable performance and longevity.