not sure if this helps jim but i believe stock is 75.5 inches, and the L pullies are using a 74.5 inch belt, so i would split the difference and go with a 75.0 inch or 4080750, I'm not sure if this belt exists though! good luck!
Leon
Leon, is there a FACTORY belt that will fit using an L pulley? Looking for that stealth look so the dealer doesn't notice. Not that I plan on modifying my car in any way. For the sake of science only.