I had the HPS pads before I switched to the EBC yellows (still have the HPS on the rear actually with Yellows up front). As Tony said up above the HPS is pretty much a regular pad marketed by Hawk as a "performance pad." It wears like a regular pad, it dusts like a regular pad, it stops like a regular pad. There is really nothing high performance about them and they are not better than the oem pads...maybe even worse (ie less bite). HPS to Yellow is a night and day difference. Waaaay more initial bite and ultimate stopping power than HPS hot or cold. It will take awhile to readjust your brain and muscle memory because they quite literally need half the pedal pressure as the HPS to brake the same distance.