I would be more afraid of an srt-4 since all you need to make 400+whp on these things are a $2000 turbo upgrade and a $1000 for the supporting fuel mods. Not to mention the fact they weigh almost 500 lbs. lighter than a mustang. Not bashing the mustang since i traded my 04 srt-4 in for an 05 gt since fwd is for the birds and too hard to get it to hook up, but to beat that kind of performance your gonna have to have more than just a saleen blower or procharger, and pray that you race from a stop and not a roll. But with what im planning on doing to my gt im not worried about them in the least.