GM 4L80 Stock Spline Automatic Transmission 300M Input Shaft [34670-01] When good looks are important

When good looks are important

Speedmaster high-volume water pumps have a ribbed aluminum housing and a heavy-duty ball/roller bearing assembly

Providing performance and style with its polarized lens reducing glare reflections from mirrors

Speedmaster ribbed aluminum valve covers feature a classic raised

Speedmaster high-volume oil pumps give you an additional 20 to 25 percent of much-needed oil volume for your performance application

GM 4L80 Stock Spline Automatic Transmission 300M Input Shaft [34670-01] When good looks are importantHigh 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.