SKU: FTIF2516
MPN: F2516
The PG 300M High-Flow Imput Shaft - w/Turbo Spline is a critical drivetrain upgrade engineered for high-horsepower Powerglide transmissions where standard components often fail under extreme torque loads. Manufactured by FTI Performance, this shaft utilizes 300M steel, a high-strength low-alloy material known for its exceptional tensile strength and fatigue resistance. For professional builders and mechanics, upgrading to a 300M shaft is a standard requirement when transitioning from street use to dedicated drag racing or high-output performance applications.
The "High-Flow" designation of this PG 300M High-Flow Imput Shaft - w/Turbo Spline refers to the precision-machined internal fluid passage design, which optimizes lubrication to the critical bushings and planetary gear sets. In a Powerglide transmission, managing hydraulic pressure and heat dissipation is essential for maintaining consistent shift times and preventing premature wear on the clutch packs. This design ensures that the transmission maintains peak hydraulic efficiency even during the high-RPM launches characteristic of competitive racing environments.
Compatibility is a primary concern for any transmission modification, and the Turbo Spline configuration on this shaft allows for the use of more robust torque converters. By utilizing the Turbo Spline pattern, this PG 300M High-Flow Imput Shaft - w/Turbo Spline provides a more reliable interface between the engine's power output and the transmission's internal gear train. This is especially important when you review specifications for builds exceeding 1,000 horsepower, where spline shear and torsional stress become significant risks to drivetrain reliability.
When you buy the FTI Performance F2516, you are investing in a component built for precision and long-term durability. This shaft is sold as a single unit and is designed to fit standard Powerglide cases, making it a straightforward yet essential upgrade for any serious performance build. Whether you are performing a seasonal refresh or building a new competition-ready transmission, this shaft provides the structural integrity required to handle the stresses of modern forced induction and nitrous-fed engines.
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