BTW - if you can stomach the cost, the Porterfield R4-S pads are fantastic for street use. Don't use them on the track, swap out for the R4 compound or you'll fry the R4-S pads. And don't use R4 on the street either! I talked with Porterfield tech support (nice folks), they'll answer all your questions on the phone, very helpful & knowledgable people there. The Textar yellow-box pads are supposed to be the best compromise between performance and power, but they are kinda dusty. The Jurids you have now are OE and not, IMO, designed for hard use.