lol, i read what is was, but what is it's purpose? Is this the same thing ive heard of people using for the drag strip to put between they're rear springs so that the front doesn't jerk up so much under acceleration?
It will isolate your springs from the metal of the chassis. You should have a version of that from the factory. These look to be made of urethane though. You can actually get some noises from the suspension without them like creaking or poping.