This is the proper direction of the brake rotors when installed. Note how the convex side of the slot is pointed forward. The rotors are marked left and right so be sure yours are installed properly. We feel that mounting them in the opposite direction may also help braking, but could result in severe chattering and shortened longevity. Also note the brake dust on the pads after a few hundred miles. This is common especially with the high-performance yellow pads. Brake dust is mostly rotor material, and the higher friction of the yellow pads will produce this. If your truck is more of a pavement ride with fancy wheels you want to keep clean, look into the harder green pad as an option.