So at about 950 miles on my Whipple, the belt was squealing quite a bit when cold. I'm using a Green Gates Fleetrunner belt and supplied Dayco tensioner. I replaced the belt today and found the belt I originally installed had stretched by 1/2-3/4". I am assuming the stretch is normal, but I was hoping the squealing wouldn't happen quite so soon. I am running 3.125" upper pulley and the ATI 18% OD damper. I have been looking at replacement tensioners but for the price it's a tough sell unless I know I can double belt life. What are people normally getting for belt life out of their whipple cars?