from page 1 of this thread.

To complete the Big Brake Conversion you will need to source the following:
1 Pair of Toyota Supra Twin Turbo

"UK Spec" Front Discs

(324mm)

- use 1995 for part search

- Guide Price:

£149.50
1 Pair of Mazda RX8

"Sport" Front Discs

(324mm)

- use 2005 for part search

- Guide Price:

£112.65
Note: Some Motor Factors list them as 323mm discs.

The mazda discs go on the rear I believe.
