I have a set of vintage Mickey Thompson Pistons in the original box , the side identification chart shows them to be for a dodge 426 wedge V8 with a 12-1 @ 83 compression ratio . You can see Mickey Thompson stamped into the underside of the piston , some are clearer than others . I have never seen a set like this before and it is a great piece of automotive history or perfect for a MT collector . Sold as is , please see pictures and ask questions if you have any before bidding ! For collection purpose only, not for use