Should have done this sooner, if anyone is interested. Here is the p/n. Ordered it from Amazon. Gates K060837RB Blue Racing Micro-V Belt. On my engine right now. Yes, it is a 6 rib belt instead of a 7. Less friction = MOAR POWA! Been running it since I think September. :top: 1GRracer and I are both using them and have been for quite a few months. I have had no squeaks or squeals. The only noticeable difference is that the back of the belt ( the blue side) has darkened from the contact with the pulleys. Nothing to worry about there.