Ford does not want this car to be as mod friendly as the 03/04's were. They are tired of people demodding and going in for warranty work. So they designed the GT500 with great pistons, because that is something that can fail even when in stock form if they suck, but the rods are designed for only a fraction more power than what the car will make stock. So if you start upping the power to say (550 rwhp) things will start to go bad really quick. I am at about 600rw with my 04 cobra, and the total cost of all of my mods, and a new repaint that I just had done for show purposes, I still am not at the $40K sticker of the 07 GT500. + my cobra weighs about 230 lbs less. Another thing, The blower pulley is hugging down on the snout pretty close, so in order to swap your upper pulley you will either need to have the snout machined (not recommended because it will weaken the snout), have the snout replaced with some not yet available aftermarket version, or do a complete blower swap to a whipple or something else. The lower crank pulley swap to up the boost is also a no go due to clearance issues, and that it will take about 16 hours to do the swap and at the most you will only gain 1.5 lbs of boost. Also, there may be a check in the computer that is a stand alone system that will not be accessible for corruption or tampering. This will flag if the boost is ever raised higher than stock specs. So when you go in to the dealership and they plug in the Ford database will automatically void your warranty. And for any warranty work to be done the dealer must plug in, so there will be no "mod friendly dealerships" any more. Also, I was allowed to go through the car pretty well at a car show, and I think that it will be almost impossible to put a rear tire wider than a 295 on the back. Heck, I have 315's on my 04, and that is not yet the max that I can go. This has all been discussed on all of the mustang boards, I just figured I would pass this info on to you all.