Scania Straight 6 Open Pipe Sound v2.1 for Ets2 1.26.x game version

New version 2.1
- Added more engines

Version 2.0
It works with all SCS Scania RJL
- Scania SCS
- Scania R
- Scania R4
- Scania RS
- Scania Streamline
- Scania T
- Scania T4