FTI Transmissions F8001 300M Billet Input Shaft for GM 4L80E & 4L85E

The FTI Transmissions F8001 is a high-performance 300M billet steel input shaft engineered specifically for GM 4L80E and 4L85E automatic transmissions. Built to exceed OEM standards, this shaft is an essential upgrade for high-horsepower pro-street, racing, and off-road applications that demand superior drivetrain durability.

Machined from hardened, aircraft-quality 300M billet steel, this input shaft delivers exceptional tensile strength well beyond what factory components can provide. It features strategically placed lubrication holes for improved oil flow, and a resized diameter for optimum stress distribution along the full length of the shaft, including the extended high-gear splines and oil ring area.

Key Features:

• Constructed from hardened aircraft-quality 300M billet alloy steel
• Designed for GM 4L80E and 4L85E automatic transmissions
• Resized diameter for optimum stress distribution along the entire shaft length
• Lubrication holes for increased oil flow and improved reliability
• Extended high-gear splines with reinforced oil ring area
• Stronger than OEM — ideal for high-horsepower builds
• Made in the USA
• Sold individually

The FTI F8001 billet input shaft is a direct replacement upgrade for builders and racers who need a dependable, heavy-duty internal component that won't let them down under extreme power loads.