If you go with the GT2 I would upgrade right to the RPM A-Arms. I busted one right of the bat but the car is very tunable once you go racing. Also get a starter box. The pull start gave me a lot of problems and also the one way bearing causes a lot of friction on the pilot shaft causing slower RPM's (or make sure you oil it GOOD!). This happened to my friend and I. Now my car is completely rebuilt with a new power plant. Ready to rip!