FYI, Porterfield R4S's are a fairly aggressive pad and have a higher price. Yes, its their street pad but a high performance one as well. As such, they need a little heat and won't bite quite as good the first time they're used or until they warm up. They are a very good pad for a multi use car such as street, light lapping and autocross use. They are also one of the few pads that has a matching rear shoe if you have drums on the rear. The Hawk HPS or Mintex AF might be a better option if the intended use is primarily for the street. Both of these pads work well for autocross as well. We currently have the Centric/Mintex combo on our car and like it alot. You'd be happy with the Brembos as well.