What ventilated discs would you be using?? And by calipers pacers you mean like the xu1 spacer??
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Never looked into the finer details of which disc in particular but something with the diameter machined down to standard & an extra wide (10mm+ etc to suit the disc) XU1 type caliper spacer.
Some of the NC racing guys run this type of upgrade apparently.
Anyway i took the Torry for a couple of thrashes around the Collie track & i must say im happy as with the brakes so far! 
No fading at all! 
Lasted the day with no issues
They were only 5 lap sessions so i really want now to go to Barbagello & give it a decent workout! 
