Welcome to the Org. While I cannot personally comment on the setup, a combination I am seeing for the rear is e46 325i rear calipers, 1 series rotors and
http://srs-concept.com/product/e36-3...e-adapter-kit/ adapter. On my swap in the spring I will be running vented fronts, e34 rear calipers, SS lines and green stuff pads. Mine is a street car. I'm sure members with dedicated track cars will comment. Have fun!