In 1st and 2nd gears. Especially 2nd if I am cruising slow and nail it.. right around 4000 or so when I am hitting full torque, then back end comes out and I fishtail to redline, but it regains traction to 3rd. If you are doing it in 3rd and 4th, that's pretty crazy. I have a feeling it not only has to do with your torque, but the narrow profile tires of your 18s as well as maybe excessive camber or toe.