Black brake calipers are the most common, and are generally used in entry-level Porsche models, such as Boxster and the junior Cayenne.
Silver brake calipers can be said to be an upgraded version of black brake calipers, which are generally used for upgraded versions of entry-level models, such as Boxster and Cayenne, and are also slightly seen in intermediate models, such as Carrera entry-level models of 9 1 1 series.
The red brake caliper is a brand-new braking system, and its main feature is to increase the size of the brake disc. Take Kaman as an example. The sports version of Kaman S comes standard with the red caliper braking system common in Porsche mid-size cars.
If you see a Porsche with yellow calipers, you can try to buy a lottery ticket. Maybe your good luck will make you win the prize, because what you see is a very rare top-class sports car, yellow, which is the special color of Porsche PCCB composite ceramic brake system. Only top sports cars such as Carrera GT, Cayenne Turbo S and GT3 of 9 1 1 series are equipped with yellow brake calipers and ceramic brake discs.