So, if I got this straight, for my 2003 GTP, I would need modified fuel rails, new gaskets would be a good idea, a new belt, water pump, hoses, radiator, would probably be a good time to throw a smaller pulley on the S/C. Hmmm......


One more question, would I HAVE to get a tune, or if I only go t say a 3.5 or 3.4 pulley, would the stock system be able to handle the new setup? I understand a tune would get the most out of the setup, but just curious if it is a must have?