My last name is Pistone that's it I know nothing about pistons. If you know the grade of aluminum though it should bring top dollar or you are getting the shaft. Yards that pay for a few grades of aluminum I can put a paycheck on it when you walk out the door after getting bent over are shooting it with the gun and putting it in the appropriate gaylord for shipment to a smelter how do you think the scrap yard makes money hand over fist.