SUPRA is the fastest car in the game ( nd pretty cheap too.. around 25 k ).
tune it to max (tier 3 power and handling packages)
put it into drag racing... i have broken all the track records... (i achieved 7.44 secs in 1/4 miles and 10.7 in 1/2 miles)
for GRIP... BMW m3 e46 is best .. cause of its handling.. (set up tier 2 power and handling).. nd yu wont loose any grip race.
for wheelie...(its expensive affair).. get dodge charger.. nd max it..
for drift.. try with dodge viper... i have crossed 4500 points (while the opponents could touch only 2800)