![GM 4L80 Stock Spline Automatic Transmission 300M Input Shaft [34670-01] Speedmaster automatic transmission input shafts](https://cdn.shopify.com/s/files/1/0762/0316/3867/files/PCE602.1009.jpg?v=1785226933)
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Speedmaster automatic transmission input shafts can withstand the stresses and the added power
from mild to wild
Speedmaster C4 automatic transmission small block to big block torque converter conversion plate
Engineered for performance and built to last
These Speedmaster aluminum water pump pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs
GM 4L80 Stock Spline Automatic Transmission 300M Input Shaft [34670-01] Speedmaster automatic transmission input shaftsHigh horsepower and hard launches can cause tremendous stresses on the internal transmission components. Speedmaster automatic transmission input shafts can withstand the stresses and the added power.
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