They will make your rear track wider by 2.5 inches if you get the good concentric ones there will be no problems I drove it for several months with out them just slight rub on the inner fender liner in the rear on hard turns at speed nothing to worry about. I just didnt want to hear them rub, if you go any wider the will stick out of the rear wheel well quite a bit.. just make sure you torque them to 100 ft/lbs as well as the wheel lug nuts all will be good.. not a bad idea to retorque after a few days .. there are quite a few members here running them..