DF-9106 Dual-Flex Engine Mount Isolator Mount is specifically designed for In-Line Six Cylinder Diesel configurations in the 300 - 485 Horsepower range. The DF-9106 uses a proven design developed to absorb the angular prop thrust loads exerted at peak torque minimizing forward angular movement as well as side to side movement in rough seas. DF-9106 mounts feature a heavy duty aluminum casting with durable oil and fuel resistant elastomer element.