This item is Compatible with Oldsmobile applications. 1969-72 , , W-30 4 Core Radiator Core Support Mounting Brackets and Rubber Inserts. These are the lower mounts for a 4 core radiator. If you are converting your car to a 4 core radiator you will need these larger mounts. If you have changed out the core support due to rust issues you will need the larger mounts to get the 4 core radiator to sit in the core support the right way. These mounts are a brand new reproduction of the originals in every detail. Also included are the rubber cushions that mount in the steel bracket.