I really wanted to keep the stock calipers/rotor size that came with the car as my Z is a daily driver with just slightly over stock power levels. There was a major improvement with the brakeman pads over the unknown model of Hawk pads and generic rotors that were previously installed. Overall I do feel more confident pushing harder than before. If I had a lot more power, I would probably want to go with bigger calipers, but this was a great upgrade for my application and I would recommend it.