FarmerTed- are you sure you don't have that backwards? I've never used a Speedy-sleeve, but that front one looks way too thick to me. I would think that that much of an increase in the diameter of the pulley sealing surface would toast the seal from too much friction- seals a sensitive little buggers. Incidentally, does any one know the Napa part number for the SS? I'm gonna pick one up tommorrow. Maybe I'll just check the Napa website. I'll let you know what I find out...