Suncoast Converters 300M Alloy Input Shaft 12-7/8 COA-12800

The Coan Racing COA‑12800 300 M Alloy Input Shaft (12- 7/8″) is a top-tier, high-strength component engineered for GM Powerglide transmissions using 1.69, 1.76, 1.80, 1.89, 1.96, and 2.03 low-gear ratios. Constructed from 300M alloy, renowned for its exceptional tensile strength and durability, this shaft is precision machined. It fits seamlessly within Powerglide cases and torque converters configured for the included gear ratios, offering a robust upgrade over stock shafts for high-torque applications. Built to withstand extreme forces, the COA‑12800 is ideal for racing and heavy-duty street Powerglide builds. This shaft enhances drivetrain resilience and promotes reliable power transfer without requiring modifications, providing a direct-fit reliability that matches performance-driven expectations.