Tuned car with orginal enginesound NFSU 2?

[Monzter]

Hi, i just wanted to ask: Is it possible to have the orginal engine sound on a top tuned car in nfs u 2 by doing anything with the .abk files in the Sound\Engine folder?
Personaly i don't really like all the new engine sounds that comes when u tune the car. I like the orginal sound better on some of the cars, i think some people will agree on me there..

Please help me if this is possible