Recommended for road racing or extended high speed/high temperature applications to reduce gear oil break down, increase gear and bearing life. Original equipment on 2013-2014 Mustang Shelby GT500...
5 x 4.5-inch bolt circle, 2.775-inch wheel pilot hub for popular Mustang size wheels Should be used with IRS Knuckle Kit M-5970-A Original equipment on 1999-2004 Mustang Cobra