I know JLT made was very succesful with some sort of intake kit chip calibration to allow the computer react better to the intake modification (I think the 05s computers are very sensitive to intake modifications). I remember numbers being posted of over 300 rwhp and well over 300 rwt. I don't think the 05 GT kit is out yet but stay tuned because I'm sure it will be out soon. I have a JLT RAI for my 98 cobra and was very satisfied with the performance increase.