99 out of 100 times, brake shudder comes from pad material being transferred to the rotor.
Pad material transfers when the rotor exceeds the operating temperature of the pad.
Essentially you have two options:
1. Add more brake ducting
2. Switch to a higher temp pad
EBC Yellows are a good pad for any track car on street tires (read: not R-compound). They do wear out quickly during track use, but they have a great progressive feel once up to temperature. Be warned though, their friction coefficient (amount of bight they have) at lower temperatures is noticeably less than at operating temperatures.
Finally, I am happy to hear that nobody has recommended Carbotech brake pads.
Worse...
Pad...
EVER!!!
With EBC Yellows, I could get 8-10 hours of track time on one set of pads. Meanwhile, these POS Carbotech XP24s looked like this after just 7 hours.
