Kumho 712's suck...I'm sorry. I work with Tires everyday....And They tend to seperate on performance cars.....Audi's, BMW, Mercedes, and even on my friends integ.

Anything with not perfect camber will tend to have seperations......And as you now even Audi and m3's and so on always have negative camber stock.......

Try the Kumho MX or a Yokohama avs es100....They are cheap priced tires.....