my question: Has any one bought this pulleys and istalled them in your car, and if so, did you feel any diffrence?? Do you you know what is the H.P gain?? And last, i heard that with this pulleys, your car tends to run a bit hotter?? its this true??.... also, if you had a choice wich one would you pick, the billet pulley set, or alky injection?? (both are around the same price.).. thank you for all of your suggestions and comments......biggrin: :biggrin: