NFSU2 Muscle Car Sound Overhaul 

Also for charger you could use: dodg hemi, duster, polara and hemi cuda from carbon

With sound tuner you can add new gins in same way as mw and carbon.

I suggest you to set AEMSMix_S_RPM & AEMSMix_L_RPM to 0 and GINSUMix_S_RPM to 1 for all sounds. (Obs.: Charger extreme package sound is animal)