Here's the final parts list.
Calipers - I believe that any of these will work with 370/345mm rotors. For the front calipers, please verify the rotor size cast in the caliper prior to purchase. I believe that all of the rear 2-piston calipers are for 345mm rotors.
- Stock calipers from an M3 or M4
- M-Sport calipers from a 335, 340, 435 or 440.
Common Parts
- Bleeder screw BMW 34-11-6-780-509
- Bleeder cap BMW 34-11-6-780-508
- Rotor bolt BMW 34-21-1-161-806
- Seal conditioning fluid (for pressure seals) Brembo 04.8164.90
Front
- Backing plate Left BMW 34-11-6-872-081
- Backing plate Right BMW 34-11-6-872-082
- Disk brake pad pin (2 per caliper) BMW 34-11-6-850-934
- Anti-rattle clip BMW 34-11-6-862-801
- Wear sensor BMW 34-35-6-792-289
- Pads Hawk HB765B.664
- Rotors (370x30 cross-drilled) Stop Tech 128.34144L/R
- Brake lines Stop Tech 950.34032
- Carrier/Caliper bolt BMW 34-10-6-864-424
- Boot (40mm 4 per caliper) Brembo 20.4872.46
- Pressure seal (40mm 4 per caliper) Brembo 05.5955.58 (8-pack 105.7224.46 or 105.5955.58)
Rear
- Backing plate Left BMW 34-21-6-792-243
- Backing plate Right BMW 34-21-6-792-244
- Disk brake pad pin (2 per caliper) BMW 34-21-8-046-255
- Anti-rattle clip BMW 34-21-6-857-151
- Wear sensor BMW 34-35-6-792-292
- Pads Hawk HB766B.624
- Rotors (345x24 cross-drilled 185mm parking brake) Stop Tech 128-34147L/R
- Brake lines Stop Tech 950.34531
- Carrier/Caliper bolt BMW 34-20-6-850-536
- Boot (44mm 2 per caliper) Brembo 20.4872.48
- Pressure seal (44mm 2 per caliper) Brembo 05.5955.60 (8-pack 105.7224.48 or 105.5955.60)
Feel free to substitute rotors and pads of your choice.
NOTE: Brembo makes it difficult to purchase the pressure seals. I've found a few vendors for these:
- Porterfield Brakes (https://www.porterfield-brakes.com) - This vendor is in southern California. Enter the part number without the dots.
- Hayward Racing Brakes (http://www.hayworthracingbrakes.com/) - This vendor is in North Carolina. They specialize in rebuilding brake calipers, but have access to the parts needed. No web sales.
- Overnight Parts From Japan (https://www.onpfj.com/) - This vendor is in Japan.
- AG Racing (https://www.racing-professionals.de/) - This vendor is in Germany. These people are as crooked as a dog's hind leg, and are only being included here for completeness. I would ONLY consider using this vendor if I were in the EU. Be VERY wary of their overpriced slow shipping.
StopTech also makes pressure seals that they say are replacements for the Brembo parts, and cost about half as much. The StopTech part numbers for the seals are 753.99005 (40mm) and 753.99007 (44mm). They also have boots (750-99005 - 40mm and 750-99007 - 44mm) and conditioning fluid (502.10000).
Purchase of the boots from Brembo or StopTech will also save some money, as the BMW Dealer markup is avoided.