Brake proportion rear disks.

[les g]

Adrian
it would appear the wallet is the limit with brakes
i think upgrades are more about heat dissipation and survivability of brakes in racing conditions
also things like lightness of pedal/pedal effort/driver fatigue.
speed of brake application and release.
and also lightening of brake assemblies to reduce unsprung weight etc
you cant get better braking than if you can lock all the wheels which is obviously achievable with a sierra set up
its the other bits that people are looking at
cheers les g