After 3 months of road driving and 3 days of track racing (once a month) these pads squeak at warm up/operating temp. Used Permatex 24125 Ceramic Extreme Brake Parts to lubricate the caliper pistons, the back of the pads and any contact points where the pad exerts a hard force on the caliper. Then the pads squeak. Squeaks under light to moderate braking. I installed these pads on my Brembo GT, I had no problems with Brembo pads before. Now I bought EBC Bluestuff NDX DP51110NDX pads and tried if it would be better than Hawk HPS.