It will work on an older model, you just have to get the correct heat exchanger mounting brackets, modify intercooler pump bracket and maybe a hose or two. Roush would be able to tell you what is needed.
It was installed by Ford with the 5lb pulley. He couldn't drive a standard very well, smoked the clutch, then had issues with the slave cylinder and got fed up with the car. Dealer offered him crap on trade in, so we put the car back to stock and he traded it on a truck. Blower only had a couple thousand miles on it.
damn this is tempting...ill have to give roush a call and see how much it cost roughly to get the kit converted to fit an 05. price OBO? or set in stone?