Yep, that's right fellow Bullittheads. In the August 2008 issue of "Hot Rod" magazine on page 52..."The rear axle assembly is borrowed from the Bullitt Mustang parts bin with a 3.73:1 ratio and sturdier pinion bearing, with a Ford Racing/Torsen limited-slip differential installed" On the next page..."while the fresh-air kit is based on Mustang Bullitt components" Their speaking of (in Ford's own words) "The company's first official factory production racer in history."It's the FR500S the $75,000.00 n/a "out of the box" race car from Ford in an article tittled "The Birth Of A Race Car" I remember reading that the Bullitt's rear end was made beefier than the stock GT's. The list of true improvements to our cars keeps growing, but hey, we already knew that by the way she "feels".....so good!!