Part numbers do tell a confusing tale. Some changes would include the pulley width, or if there are 2 grooves. So not as clear as I would like. Panic makes a good observation: if it buzzes it ain't right. Also his observation about material brake down. Good warning to heed. So...use the best you can find and watch for any "buzzing" would be as good as it gets? Wish I could sit down with one of the Engineers for a beer or 4.
