The 1987 Indianapolis 500 came to a stunning conclusion, as favored Mario Andretti faded late, with Al Unser pulling what was considered a tremendous upset in winning his record-tying fourth title. This is a race-used piston from that very event, signed by Unser and Roger Penske. A handwritten "OCZ99" is written inside, and this piece is sourced from Danny Ongais and from Larry Howard's Collection.