Bosch has supplied Hydro-Boost (Hydraulic Power Brake Booster) assemblies to Original Equipment Manufacturers since 1973 Designed, tested, and manufactured in the United States of America to match original equipment specifications, ensuring optimal brake system performance for maximum safety when hauling or towing heavy loads Every Bosch Hydro-Boost Power Brake Booster Assembly is 100% new, and is hydraulically tested and verified for quality assurance before leaving the factory Accumulators are charged to OE specifications for each specific application for increased safety and peace of mind Bosch Hydro-Boost Power Brake Boosters are designed to exceed 500,000 pedal strokes, ensuring reliable performance and a long service life Compatible with select vehicles (Note: vehicle trim level/engine may affect fitment - verify specific fitment details with fit checker above): FORD: 2017-22 F-450 Super Duty, 2017-22 F-550 Super Duty