I am looking at getting a Mongoose (vortech) for my 99 GT, my car is basically Stock. I have 2 friends that now have a 5.7 GTO (350) HP and a 04 STI (the 320 HP one i think). Will the mongoose kit allow me to keep up with them? I will do additional upgrades later, as i graduate school in one semester. But for now how will i fair against them. I believe the mongoose kit will put me in the low 13's high 12's. and i think the GTO is a mid low 13 second car? and the STI being a little quicker in the high 12's? Anyone want to chime in, which maybe some times for these cars?