Going down in size on the master cylinder bore can cheat to spike up the pressure to the caliper pistons, but it reduces the volume of fluid the caliper piston bores get, giving you an incredibly long pedal throw. The feedback from customers is that vacuum pumps are loud, don't keep up in traffic, burn out too quickly, stock replacements are hard to find after 10-20 years, and aftermarket ones are of low build quality. The Hydro-Boost should provide an impressive increase in power with your stock pump, but power steering pumps can be modified as well to produce more pressure, which gives you room to get even more braking and steering assist, when using the Hydro-Boost, if you are left wanting more. The Hydro-Boost is more powerful overall, and does not depend on manifold vacuum, so it is great for vehicles that have a high performance engine, diesel engine, tall tires, tow a trailer, or are just heavy. Big camshafts and other engine modifications rob vacuum, and diesels don't make vacuum at all. Most 5 lug and larger vehicles produce more than a 1,000 pounds of pressure in the power steering system, the Hydro-Boost taps into this rather than the 15 pounds of vacuum that you hope to get from your engine manifold. Below is a guide for making your selections, along with pictures of the items listed in the drop down menus. Use the drop down menus to make selections on the unit finish, master cylinder, and hydraulic hose set to put together your kit.

A booster and master cylinder are required to replace the Tevis electric unit. You can buy the booster by itself or use the drop down menus to see options like - master cylinders, hydraulic hoses, and chrome & powder coat, to make it a complete kit.

This NEW Hydro-Boost, hydraulically powered brake booster, fits 1989-1992 Ford T-bird Super Coupes and is a conversion from the now obsolete electro-hydraulic brake booster that it came with that is no longer supported with replacement parts.

92 thunderbird