Detroit Diesel Series 60 sound (2 Variants) v1.0

This mod I combined OnBoard, Kriechbum and SCS DD60 sound and make it 2 variants

- 7inch and smaller pipe sound

- 8inch and larger pipe sound

Supported truck:

SCS Kenworth W900

SCS Peterbilt 389

SCS Peterbilt 579

Peterbilt 379/389 by Viper2

Freightliner Classic XL by Jon Ruda

Frieghtliner Classic XL by ReNeNate

Freightliner FLD 120 by ReNeNate

Kenworth K100E by Overfloater

I don't add some SCS truck because it doesn't have DD60 in real life

Version 1.0:

Initial Released