I've had the HPS on for about a month and it's SO nice not to have that rancid OEM brake dust anymore. The pads grab much better, but I still have issues with air in the lines. Grr.
I dont see anything show up for the ms3 or ms6 at tirerack.
I ordered Hawk HPS today and the part number for the front pads corresponded with the ms6. pn HB549F.702 and the rears were the same as for the regular 3 pn HB478F.605