I got the steeda set up on my 02 GT and it works great! More then enough fuel and alot cheaper then switching to the cobra set up. My car put down 420 hp at the rear wheels on a mustang dyno and the pumps worked fine. If you do decide to go with the cobra set up you can switch the 2 cobra fuel pumps with 2 focus fuel pumps they flow better and provided alot more fuel either way god luck
You will waste money doing something other than the '03 Cobra setup. Eventually you will need it, and then you will have spent money on other setups for nothing.
I went through two or three different fuel pump setups before I got the '03 Cobra setup. Everything else was just a waste of money.