Yeah, I don't know. My truck (2001, Ram, 1500, 5.2) probably had 100,000+ on it before I had to change a belt. I've tried several belts (that ALL sucked), and found an AC Delco (of all brands) that has lasted a few years. However, it seems it's time a gain. Belt is beginning to squeal for a minute or so if the truck sits for more than 12ish hours.