Our Performance 12″ Alpha Brake Kit is the complete kit used on the new 2006 Alpha H1 Hummers and is designed by us as a retrofit into HMMWV’s. Everything is included in the kit for the complete retrofit, simply reuse your existing calipers. Plus, we have included our Performance 12″ Slotted and Dimpled Rotors and Performance Brake Pads in the kit. By increasing the diameter of the rotor from 10″ to 12″ it allows for much greater brake torque resulting in a greatly decreased stopping distance, improved feel and improved cooling. This is the perfect step between stock and our Predator Big Brake Kit at a very affordable price.