Racing For Pinks is an achievement/trophy in A Slip of the Tongue Traffic case where you need to inspect three individual pink slips and a box of pink slips all printed by Marquee Printing Company.

The achievement is relatively easy as the three individual pink slips are handed to you as part of the first three interviews over the normal course of your investigation :

Cliff Harrison - handed to you after answering Truth to Vehicle reported as stolen.
Richard Coombs - placed on the table for you to examine along side the Bill of Sale.
James Belasco - handed to you at the start of the interview.

The final item, the box of pink slips, is located behind Steven Bigelow in his office at 58 Industrial Street after the shoot-out. Make sure to examine the box prior to interrogating Bigelow, the achievement will unlock as soon as you examine the box.