So I'm having my calipers refinished and the last time I went to a dealer they "suggested" to do my brakes. Long story short, I like working on my cars and dont like over paying for stuff. Im planning on buying sebro rotors for the rear and ebc reds. My question is regarding the pads. They say in the description that they have the shims already. Do I need to buy or can I reuse the little shims for the rear that go inside the pistons on the caliper??? Another questions, does the sensors need to be replaced. Once again thanks fir your opinions and answers!!!!