This big also mod adds many engines and new sounds :
-Cat C15
-Cat 3406E
-Cummins N14
-New Paccar
(If you choose a Cummins ISX, you will have the SCS Stock sounds).
Update 2.1 from 2016/02/21:
-Added sticks and air sounds for parking brake.
-Cummins N14 interior sounds low rev's reworked.
-Cummins N14 totally new exterior sounds.
-Cat 3406E Changed jake brake for a real one.
-Paccar Remove an unnecessary 455 hps engine (there were twice the same engine).