This is an 8" Dual Diaphragm Power Brake Booster Kit Compatible with Early Model 1959-71 Dodge Chrysler Fullsize Cars, 1962-74 A, B, & E Body Cars, and Dodge D100 / D200 Trucks. Note: This kit is designed forconverting vehicles with manual master cylinder brakes or hydro vac systems to a vacuum power assist brake booster setup.