See this car on the way to work everyday parked near a smash repair place which im guessing the owner works at. I've also seen the front bar sprayed in primer before.
If set to either max negative/positive camber and torqued correctly, it shouldnt move. Its only when you dont set it to max theres a chance of slippage.
On stock sussy, you will scrub the rear going over speedhumps and hard cornering, and it will obviously be worse if you have passengers in the back. Its easier to just roll the rear guards.
those black parts come with the bumper........just not painted yellow in particular.
its the middle grill section and hook cover that u need you need to buy.