Have over 40,000 miles on P1SC install. Recently changed the waterpump and leaked coolant all over the blower's ribbed belt. Sqeaking like a banshee on fire. No amount of belt dressing could cease the howling.

After replacing the belt, it has brought some boost and power at all ranges of RPM not experienced in quite a while. I can only assume that it had been slipping for quite some time.

I had thought the car was getting tired and the power was down. Turns out a new belt can change your perspective in a hurry.