I bought a "damaged" block. The description said the outer box was damaged but the unit was like new. The description was accurate. There was a tiny dent on the muffler, maybe the size of a hailstorm, but otherwise no visible damage. My mechanic will now install it. My goal was to drown out my F-150 significantly. It shouldn't be too difficult as it now has double glazed silencers. UPDATE: The silencer was installed and is exactly what I wanted. I can listen to the radio or cell phone while driving, but the engine sounds fine at idle.