This part is listed by BMW as BMW part number 34108424039 (34 10 8 424 039) and is described as AP Brake Piston (31.7mm) for BMW F82 M4 GT4
This is a part that we buy directly from BMW Motorsport. It was originally designed by Motorsport engineers for competition use in a factory BMW racing program. As a part designed for competition use, it does not have a warranty. BMW Motorsport parts may sometimes be in short supply and orders are released at the discretion of BMW Motorsport. If a part is not in stock, contact us for the latest estimate on delivery time.
F82 / F83 (2015-2020) > M4 GT4