This brake master cylinder is precision-engineered to match the design, function, and performance of the original master cylinder on specific vehicle years, makes and models. It is made of new, high-quality materials for a safe, durable replacement. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Buick Electra: 1963, 1964, 1965, 1966] - [Buick Invicta: 1963] - [Buick LeSabre: 1963, 1964, 1965, 1966] - [Buick Riviera: 1964, 1965, 1966] - [Buick Wildcat: 1963, 1964, 1965, 1966]