I did my upgrade a few years ago. If memory serves, the parts to upgrade the tensioners to the hydraulic units, a TFI, and a Big Sucker air cleaner, and the necessary tools and fixtures ran me about $1300. I did the work myself. Probably $900 of that was for the tensioner upgrade. Can't say if prices have come down since then, but I recall one forum member relaying to me that he had a dealer in his area that would do the whole job for about what it cost me in parts and materials. If you're not satisfied with the price, shop around. Remember, sometimes when you go to a shop for repairs, and they sense that it's "urgent" as tensioner replacement can sometimes be, the price goes up.