rick50,
I hate to break the bad news to you but the ITG filters do fit under the hood of a Cobra or replica. At least they do on my CSX car. Due to the problem of not being able to view or post photos here right now, I can't show you. However, if you can, check my gallery, you can see that the ITG filters do fit.
They are not a bolt on application. You have to physically fit them to your car. Good luck!