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Prothane engine mounts for 1955–1957 GM applications replace worn factory mounts to stabilize the powertrain and reduce engine movement. These black motor mounts are a direct replacement option that restore secure mounting and help maintain proper alignment of driveline components. They suit restorations and street-driven vehicles where durable, correct-fit mounts are required.
Prothane 55-57 GM Motor Mounts - Black
