The 1997-1999 Ford F-150 Lobo 54-74225 Vacuum Power Brake Booster is a steel brake booster designed specifically for these model vehicles. It comes with a booster, instruction sheet, and seal kit included, making it a convenient and comprehensive purchase for customers. With a housing diameter of 11.67 inches and a diaphragm diameter of 11.46 inches, this brake booster is a reliable and durable component for ensuring proper braking performance in Ford trucks. The manufacturer Carquest offers a 5-year warranty, providing added peace of mind for buyers.