Brembo's calipers are directional, due to the use of sequential piston sizes. The leading pistons are smaller in diameter in order to combat uneven wear of the brake pads.
The mass of any vehicle requires energy to accelerate or decelerate. Reducing vehicle mass improves acceleration and requires less energy to be dissipated during deceleration.
The usable life of a brake disc is influenced by a number of factors including vehicle weight, driving style, vehicle usage, brake pad material, and many others.
Brembo does not recommend repainting calipers due to the potential issues that can be created when done incorrectly. If you choose to paint your calipers regardless, please read below.
During braking, the front of the vehicle does the majority of the work. Exactly how much of the braking is influenced by the vehicle's weight distribution, wheelbase, and center of gravity.