That's great to hear that you can use those pads on the track. Not having to change pads before and after track days is probably worth the price of the upgrade in itself. Do they squeal at all?
///M3 E90 '09 Le Mans Blue | DCT | Silver Novillo | Tech | Prem | 19"s | Prem Sound | iPod
StopTech BBK | Volk VR.G2 | H&R Sport Springs