Sounds File for Sprint Car Road Challenge

Hello, I search the "sounds" file to the "Sprint Car Road Challenge, GTR2 Mod by SCCA1981.
Thank you in advance for your answers.    

It uses default GTR2 sounds found in the \GameData\Sounds\GTR\ folder.............

SPRINT3SOUNDS.aud file in the mod:
// inside coasting
VS_INSIDE_COAST_ENGINE_1=GTR\vette_idle.wav
VS_INSIDE_COAST_ENGINE_2=GTR\vette_offverylow.wav
VS_INSIDE_COAST_ENGINE_3=GTR\vette_offlow.wav
VS_INSIDE_COAST_ENGINE_4=GTR\vette_offmid.wav
VS_INSIDE_COAST_ENGINE_5=GTR\vette_offhigh.wav .....are you missing the .aud file?

 Many Thanks Joeschmoe