Looking to fit these to an RS Turbo with a 2.1 Zetec as the 283mm 4 pots I have just cant cope

Are they any good?

 

compbrakes have a mixed reputation, but they should be decent enough to stop you quickly.
i've just fitted FRS mk1 discs and callipers and the ease they scrub speed off is amazing, grant on an xr2, but still great over the 4wd cosworth (278mm) setup i had on previous.

 

i run the 315's as i've got 16's and with the mondeo servo etc they bring you to a halt sharpish