Although many "Hot-Rodders" have not completely accepted the idea of using hydroboost brakes on their classic cars and trucks yet, there are some perks to using this brake system that people may not know about. Let me explain how they work. All of our hydroboost brakes build up pressure by using the hydraulic pressure of the power steering pump. It's because of this that no vacuum is required. Not only are the hydroboost systems smaller, but they also build up 20% more vacuum pressure than an eight. They are also not affected by Big-cam motors or other low vacuums. We have been testing these hydroboost systems for over 5 years, and they can easily be adapted to our existing kits.