I have one of the first 4 wheel kits that Ireland put out and have had good success with it. They fit my street wheels without spacers which is something that was important to me as I would not run spacers in a performance application if it was at all possible. As a means of comparison Brembo offered me a deal back in the day but I would have had to use 25mm spacers to fit those rims. Needless to say that wasn't going to happen. All in all i have at least 30,000 miles on this set up and some of them might be considered a bit " harsh "

They are slotted and having previously gone thru 2 sets of drilled rotors that is the only way to go IMHO. As Brian mentioned the balance is very good and if you like "squat " instead of " dive " its a great way to go.
Randy
M7 Tuning