Engine sound pack for T800, W900 v2.8

Changes 2.8
- Added new Straight piped C15 Cat.
- Updated the def for the GTMike's T800 (no need an extra patch now).
- Fixed a small error with a 3406 engine def.

What's that sound pack adds to the game?
This mod adds those engines and their sounds in the game:

-Detroit Diesel 60 Series
-Cummins ISX
-Cummins 444
-Cummins N14
-Cummins N14 2.0 (different interior sound)
-Cummins N14 Celect PLUS
-Caterpillar C15
-Caterpillar C15 Straight Piped
-Caterpillar 3406E
-Paccar MX series
-This mod comes with a separate mod to add realistic transmission, tires and wind sounds in the game.

Which truck are working with it?

-Kenworth W900
-Peterbilt 389
-Peterbilt 579 (partially)
-Kenworth T680 (partially)
-Kenworth T800 by GTMike