Brake Caliper Identification -- Bill R chime in

[mholbrook]

OK, I got the brake calipers and carriers from the Bavarian joint selling on eBay. The fronts look fine and correct, they have cast in numbers on the caliper 80/28/302 which I take to mean 302 rotors and 28mm wide.

The rears are the ones that I need identified. The casting numbersfor them is 38/10 on the outside. Of course they are dirty which is to be expected and I have not looked for stamped in part numbers. Are the part numbers cast into the calipers/carriers?

By the way, the point here is to do a slight upgrade to 302/28mm front 540/7xx brakes and 300/20 vented on the rear versus the 300/10 non vented on rear (540/7xx rear)

Appreciate any help.

[Scott H]

it should be marked 20 for the width of the vented rotor as you suspect. The only differences between the 525/535 rear brakes and the 540/M5 rear brakes is the opening between the piston and the outside fangs for the outside brake pad, as well as the carrier having a wider opening to accept the wider rotor.

can you fit a vented rear rotor in the carrier? how about in the caliper with brake pads temp fitted?

[Bill R.]

legion of others on here that have upgraded calipers would be able to help you.





OK, I got the brake calipers and carriers from the Bavarian joint selling on eBay. The fronts look fine and correct, they have cast in numbers on the caliper 80/28/302 which I take to mean 302 rotors and 28mm wide.

The rears are the ones that I need identified. The casting numbersfor them is 38/10 on the outside. Of course they are dirty which is to be expected and I have not looked for stamped in part numbers. Are the part numbers cast into the calipers/carriers?

By the way, the point here is to do a slight upgrade to 302/28mm front 540/7xx brakes and 300/20 vented on the rear versus the 300/10 non vented on rear (540/7xx rear)

Appreciate any help.

[Jeff N.]

I've run lot's of track days without vented rear rotors without a problem.