The GTR's are ridiculous fast and with a good driver will work all the cars out there. I'm not the greatest driver, I have done about 7 track days. In the green car with a stock s15 motor my best lap at the streets was a low 1:32. The blue car before the body work was started best lap was a 130:009. That car runs about 300+ hp on 14psi boost. It also has stiffer suspension & valving. The brakes are a problem the rears lock up and the fronts fade. I'm working on a new brake setup and put the mastercyclinders in the car away from the turbo. The blue car sould be a couple seconds faster with the larger tires and good brakes.. Anyway the green car will run with most of the cars out there with drivers of my ability. I ran in the intermediate group. Rick