It all depends on your tunning. My best friend has a 2000 SI with a Drag 3 kit pushing 18 PSI and a LOT of Mods. He kills TT Supras left and right. If you want power, Drag 3 gives you way more "Play room" than the Greddy.Neyrod said:i wanna know what kinda cars can i expect too take on the street with a drag or greddy turbo on my 99 SI. if u guys don't mind, post the cars you have killed or beat with your own setup. thanx for yall help.