On a stock vehicle, being used onroad, a stabilizer may mask frontend problems, but one is almost required on a vehicle with bigger tires, being used offroad. Even a stock-tired vehicle being used offroad would benifit from one. Big tires will magnify any play even in a new vehicle. Big tires also tend to follow the grooves in the road, which is reduced with a stabilizer. My almost stock 88 f/s Bronco has a stabilizr and I think it is factory... It drives pretty straight, although I only have 31's on it.