The R8LMS is no match for these cars at 600hp. I tried every car and it was slower than all of them by at least a half a second. I think the RX7LM should be allowed. It's pretty good and is faster in my hands than the Panoz. The CLK-LM is way quick, I like the handling. But at 600hp it'll wipe the floor with the competition. This is just my testing. I tried different tracks and it's about a half second faster than most any other car. Even the McLaren at 1150kg. The only cars I see challenging are the Zonda, possibly the XJ220 and maybe the Vipers, if it could go with 575hp. But it'll still be as fast as any of the others.