Your truck may be different...it depends on the truck. With mine, I only had to trim the mudflaps and tie back the parking brake cable and fenderliner in front of it. I trimmed a little off the front bumper and reshaped the driver's side fenderliner in the front with a heat gun. It all depends on how much you want to do and which brand tires you are installing. All this adjusting was just for the truck with stock rims.....with aftermarket rims, I had to remove the front mudflaps and trim more off my bumper....but you have to look close to see where I trimmed it.