| The HH pads are designed for use with stainless steel or ductile iron rotors. You will experience accelerated wear and elevated heat levels which are the last thing you want with a cast iron rotor. More heat means more thermal expansion-induced stresses in the disc and their tendency to shatter under severe race conditions is the main reason why a number of race organizations ban the use of non-ductile iron discs. Cast iron rotors give significantly better braking than stainless because of their higher coefficient of friction, but I'd err on the side of caution here. I'll second the vote for Ferodo CP911* pads.
[Edited on 6-20-2004 by Shazaam!] | 
Shazaam!
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