The Perrin license plate delete PSP-BDY-110 is a universal fit piece that will work on the 2002-2007 WRX/STI. The license plate bolt pattern is standard in all 50 states and Canada. What you are talking about is shown below. The actually physicall surface area of the license plate mounting surface has changed. The 2004-2005 license plate area, even with a license plate does not cover the entire area. For 2006-2007 Subaru redesigned the mounting surface to fit exactly the size of a standard license plate for the US and Japanese market. The 2004-2005 mounting area is notched on the sides and longer to accomodate a standard US & Japanese plate as well as the longer European plates. Perrin's plate delete is made to the size of a standard US license Plate width and the bolt pattern is standard as well. I hope that helps everyone understand the differences.