Drums and Rotors Left And Right Rear Rotors 5 On 4.5 Inch And 5 On 5.5 Inch Bolt Patterns High Performance Slotted 1997-1998 ZG (Europe) Grand Cherokee RT Off RoadRT Off Road's Slotted Brake Rotors are manufactured to improve upon the shortcomings of OE brake rotors. They feature slotting which improves heat dissipation and greatly reduces brake fade. The addition of the channels also allow the heat, gasses, and debris that are byproducts of hard braking to dissipate more rapidly. This results in lower rotor temperatures which reduces the chances of warping while providing increased braking performance. Each