Just a quick review of the Porterfield r4s brake pads in combo with motul 600 brake fluid. These pads are not their specific race pad but are more of a street/autocross pad per the guys over at Porterfield in Costa Mesa. I ran 5 25 min sessions in 100+ degree weather and didn't experience any brake fade and the pads never gave up on me hitting 105 mph in the straights slowing down to 40 mph in less than 100 feet or so. There wasn't any brake squeal and felt very comfortable and safe in braking with these pads. Only con was the huge amount of brake dust, but that was to be expected. Overall a great pad and would recommend them.