Your accesories create drag on the engine as speed increases etc, the light weight ones reduce this drag on the engine so theoretically i dont see why they would not work. I have CFM crank and water pump pulleys on mine. Make sure you get a new water pump pully that is larger otherwise you will underdrive your waterpump with just a smaller crank pully which is not good. There are 2 down sides, your lights may dim when the car is idleing and the lightweight crank pully removes the dynamic harmanisor that is on the standard pully, this is a rubber bush which allows a bit of flex in the crank, without this some say it can put the oil pump at risk as the flex can shatter the oil pump gears