Descriptions:
This mod contains the Paccar MX-13 engines, where most of the sounds are originally from the DAF XF truck from Euro Truck Simulator 2, with environment adaptation for American Truck Simulator for the greatest possible realism.
The engines they contain are:

-MX-13 405 HP
-MX-13 430 HP
-MX-13 455 HP
-MX-13 485 HP
-MX-13 510 HP

They are adapted to the following trucks:
Peterbilt:
-387 (Ch_Vitalik)
-386 (R.Modjeski)
-389 (SCS)
-579 (SCS)
-579 NG (HKV Studios/FranckPeru)

Kenworth:
-T680 (SCS)
-T680 NG (Warryor3d)
-T880 (FranckPeru/Galimim)
-W990 (FranckPeru/Harven)

Note: Added 5 Eaton Fuller transmissions for more variety for the Kenworth T680 100th Anniversary truck.

This is the first version of the mod, more truck definitions will be added later, as well as improvements and fixes.

Credits:
-eelDavidGT (update to FMOD & file modification)
-Kapitan Kriechbaum, Alberto Ríos, SCS (sounds)

Authors:
-eelDavidGT (update to FMOD & file modification)
-Kapitan Kriechbaum, Alberto Ríos, SCS (sounds)

Download Link 2: Download mod