i am finally doing my rear dosc conversion tommorow. i confirmed sebring and eclipse brakes are the same part numbers. i have the calipers, pads, shield, and rotors. anything else i need for it? and how can i tell if the pistons are good in them or not? thanks

performance: K&N intake, 2.5 piping w/ magnaflow, msd wires, pacesetter header, ported tb, custom short shifter
suspension: 1.5 tenzo drop, rear strut bar.
looks: stock skirts, stock 16s, leather interior
future: rear disc, star stage 1