Suncoast Converters 300M Alloy Input Shaft w/ Drum PG Spline COA-32811

The Coan Racing COA‑32811 300M Alloy Input Shaft with Drum (PG Spline) is a performance-grade, all-in-one replacement unit engineered specifically for high-performance and race-ready TH350 transmissions. Crafted from premium 300M alloy, this input shaft is precision-machined to deliver superior strength and fatigue resistance compared to standard materials. The oversized PG splines ensure a significantly more robust torque transfer interface, significantly enhancing durability and reducing spline wear. The integral drum simplifies installation and ensures proper spline engagement without custom fitting. Coan’s specifications note that these oversized shaft splines within the drum help prevent spline failure in high-stress applications. Designed as a direct drop-in for TH400 transmissions, the COA‑32811 provides racers and performance enthusiasts with a dependable upgrade that combines structural integrity, seamless fitment, and elevated drivetrain resilience, ideal for builds requiring enhanced launch capability and aggressive power handling.