W126 Gen II brakes .... (Hubs, rotors, calipers, and backing plate). There are posts where you can re-use the hubs, but it just seems a lot easier to do the entire swap over. It was actually pretty simple and easy. There's plenty of pictures and threads out there on the swap and I can personally say the W126 Gen. II brakes look A LOT beefier. The only "issue" is needing 15" wheels but I did that last month.