Yet another happy Stoptech Sport user. Had them at stockish power with RE-71r on pocono (two drag strips with some corners between) and a track noob and they held up fine. Did three tracl days on that set and about 6000 street miles and only wore them down by about 1/4. They dust fairly bad, plan on cleaning your wheels weekly, but it comes right off (if it doesn't get mixed with brake fluid because of a caliper seal failure...). Occational squeak here and there on the road, but nothing like the HP+ my friend's run. This is all on 1.6 brakes. I will report back eventually on corrado rotors and a supercharger with them.

 

I just used up my first set of Raybestos ST43 Sport Brake front pads. I got 16.75 track days out of them, minimum of 2.5 hours average per day although it's probably more. At my last event of 2017 in Nov, I had a dust boot partially unseat which caused a pad to taper and lose some material compared to its partner pad, but there was never any indication anything was wrong from a braking perspective. That thinner, tapered pad chunked at VIR last weekend. I experienced some brake fade--first time with this setup--in the afternoon of the second day and found the chunked pad while checking all four corners. The other three pads still measure ~10mm total thickness including the backing plate, which seems like a lot of material left. Could the reduced thickness have caused the ATE Type 200 brake fluid to overheat? It never pulled to one side during braking, which I would have expected after seeing the chunked pad. I swapped in a new set of ST43s and didn't have any problems in the next three sessions on the VIR Grand West course.

As I mentioned in a previous post, they're easy on rotors and coexist with the Stop Tech Sports on the same rotors for the commute and use in the rain.