Porterfield is now making their R4-S brake pad for the R56 JCW brakes. These are a great performance street/light track brake pad. I've used them on my BMW for years and have been extremely pleased with them. They are not full on track pads (use the R4 for better performance there). They are very low dusting, have a great initial bite, and are easy on rotors. I put a full set on two weeks ago and although not fully bedded-in, I'm very pleased with their performance.

Texas Speedwerks is now carrying them. (I'm not associated with them, just a happy customer.)

Cheers,
Tom