hey yeah i got the same problem.

but i beat all four other kings.

Speed= i used shelby mustang,

Drift= i used BMW Z4 Coupe

Grip= Nissan GTR R34

Drag= Pagani Zonda F i got a free car marker from pickin at the dominate reward thing. or you can just got o cheats, type in unlockallthings, reload your alias and then go to ur garage and then sell the nissan 240, dodge viper srt, cobalt ss, and the pontiac gto, for about $90,000 and then save and restart the game and keep doin that over and over again.

but i have the bmw z4 coupe all the way up on stats and the drift kings rx7, i usually get like 2300-3000 with the bmw z4 coupe and 2700-3200 with the rx7, but he always gets 3300-3700