I have a 2007 Mustang GT. It has a Power Stop Big Brake Kit, AMR silver wheels 19x10 &19x8.5, Continental extreme contacts tires, BMR suspension kit, Koni struts and 2 inch lowering springs, 3.73 ring and pinion, and a True Trac differential etc... So, I've run it at Gingerman Raceway a couple of times and the rear wheels grip the track fine however the front tires are sliding thru the corner at the same time. I can't fit wider tires in the front so why not run stickier tires up front? I know you don't want to get to a place where the front tires are grabbing and the rears are breaking lose, but the rear tires are wide enough I have no trouble with traction back there.