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Speedmaster large ratio boost sleeve and valve kit address poor line rise
They're made of thick steel for reduced flex and are chrome plated for that show-car look
The Speedmaster shift selector shaft uses an O-ring to prevent leakage from GM TH400 cases
you're on your way to improved performance
and high grade nuts
7" Universal Dual Diaphragm Brake Booster Zinc Speedmaster large ratio boost sleeveSpeedmaster 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.
