Performance Technology Brake Heat Sinks for Brembo M4 CalipersThe main body of the heat sink is made of a special thermal steel with a high degree of heat conductivity. The material is first laser cut and then CNC machined in Performance Technology machining centers. The slots have the purpose of reducing the contact surface and also of letting out the hot air formed inside the piston cavity. The main body of the steel heatsink is connected to a light alloy heatsink made with a special high thermal conductivity