Well, I finally did it..bought an 04 Cobra Coupe with 20,000 miles. Awesome car..I do however have some questions. The Ford Dealership I got it from Ford Certified the car, which means it has a powertrain warranty until 2010 or 75,000 miles. The car has exhaust (cat-back), a BBK CAI, and I think an aftermarket thermostat (it takes about 20 min to get to normal temp). The dealership agreed to put all the stock stuff back on the car..at my request because I live 6 hours away from the dealership I got it from. I'm worried that the dealerships around here will balk at warranty work if mods are done..to me the warranty is more important than 20 horsepower. I'm planning on driving it back..6 hours to the dealership to have the stock stuff put back on...my question is..if I decide to NOT have the stuff put on..what are my chances of A. Something bad happening to the motor and B. If something happens my chances of the dealership telling me to fly a kite because mods are done. Now, I can always take it back to the dealership 6 hours away if anything happens..but that would be one heck of a tow bill.