Originally Posted by NYBladeZ

The 03/04 Cobra ran 12.9 out of the box. There are stock Z's doing that on here. Considering the Cobra makes 390hp/390tq out of the box the real weakness is in its IRS. Even with the whipple you'll make the #'s but you'll never put it down. You would have to swap out to a 2004 Mustang GT solid axle to get consistent traction. Of course if you do so you lose the little handling capabilities the IRS gave the 03/04 cobra. Undoubtedly a great car, 4.6L cast iron factory S/C but it won't be able to run with an S/C stg2 Z. Now if you want to talk about price and bang for the buck that's kind of dumb considering you're talking about a car almost 10 years old, of course the aftermarket is dirt cheap even by mustang standards now. The 03/04 Cobra is heavy, handles poorly and has nothing going for it except that engine which has been eclipsed by the new 5.0. Time to move on man, I was on the verge of getting a Cobra before the Z but I can't live in the past. 17K if not paid in full, will lead to an upside down auto loan, which blows!