Prothane 7-503 Motor Mount Kit GM 8-Cylinder 1955-1957

The Prothane 7-503 motor mount kit is specifically engineered for GM 8-cylinder engines in 1955-1957 applications. Unlike universal mounts, these application-specific mounts deliver precise fit and reliable performance for classic GM vehicles.

Key Features:

• Application-specific design for 1955-1957 GM 8-cylinder engines—not a universal fit
• High-performance polyurethane construction limits engine movement and reduces mount breakage
• Poly-locked "run-safe" feature provides backup support in extreme conditions
• Improved power transfer to the wheels by minimizing drivetrain flex
• Direct replacement for worn or deteriorated stock rubber mounts

Prothane's polyurethane motor mounts offer superior durability compared to original rubber mounts, which deteriorate over time from heat, oil, and stress. These mounts reduce excessive engine movement during acceleration while maintaining acceptable vibration isolation for street use.