No idea when it comes to temperature ratings.

$120 for a pair or each? $120 each is ridiculous, JDM Yard sells them for $132 the pair blanks, slotted should be around $180-200 for the pair. I think RDA Slotted should be fine if you do a cooling lap as recommended. I do recall Yonas using RDA slotted on the EGK24 at the track.