BMW M2 CS Racing brakes: steelies - no M-CCB:
- 6-piston fixed yoke front - 380mm - Alcon
- 4-piston fixed yoke rear - 380mm- production M2 CS (Brembo)
- Twin-flow air brake cooling
(source: here)
Porsche 911 GT3 Cup 991 brakes: steelies - no PCCB:
"The newly-developed racing brake system improves the endurance qualities of the 911 GT3 Cup 991. The internally vented and slotted steel brake discs with a 38-centimetre diameter are operated by aluminium six-piston monobloc racing callipers in the front, and four-piston units at the rear.
Brake system: Two independent brake circuits for front and rear axle; adjustable via brake balance system.
Front axle: Aluminium six-piston racing callipers in monobloc design; multi-piece steel brake discs, inner-vented and slotted, 380 mm diameter; racing brake pads, optimised ventilation ducting.
Rear axle: Aluminium four-piston racing callipers in monobloc design; multi-piece steel brake discs, inner-vented and slotted, 380 mm diameter; racing brake pads, optimised ventilation ducting."
(source: here)
For a comparison Cup car - no Cup car: see for example
here:
Cup (PFC brakes - Performance Friction Brakes Corp.):
No Cup (Brembo brakes):
