New pistons with new seals, New Bolts, New Brake Lines, New Bleed Nipples. These calipers are originaly from BMW E38 7 Series but with mounting adapters they also fit BMW E30 E34 E36 E39 E46 FORD SIERRA COSWORTH and maybe other vehicles. PLEASE DO YOUR OWN RESEARCH of what you will need to install these calipers to any other vehicles other than E38.