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The 10" diameter construction reduces rotational weight reducing scavenging of horsepower
from mild to wild
most include a drain plug for easy fluid changes
The Speedmaster shift selector shaft uses an O-ring to prevent leakage from GM TH400 cases
Speedmaster large ratio boost sleeve and valve kit address poor line rise
7" Universal Dual Diaphragm Brake Booster Zinc The 10" diameter construction reducesSpeedmaster brake boosters are the perfect addition to your street rod or custom application. Have you lost that vacuum feeling? If you're pushing your brake to the floor, it may be that your brake booster needs replaced, and Speedmaster has brake boosters for you.
