The 54-74225 Vacuum Power Brake Booster is designed to fit 1997-1999 Ford F-150 and Lobo vehicles. Made of steel and with a housing diameter of 11.67 inches, this brake booster includes the necessary items such as the booster, instruction sheet, and seal kit. It also comes with a 5-year manufacturer warranty and features a diaphragm diameter of 11.46 inches. This OEM brake booster is a direct fit for the specified Ford vehicles and is a reliable replacement part for maintaining optimal brake performance.