[1/26/2022|1.43]
This mod is CAT 3408 engines with straight pipe sound for some SCS truck and a bunch of truck mods

Version 1.0 Feature:
-This mod include:
 CAT 3408 T Direct Injection 400HP
 CAT 3408A TA 450HP
 CAT 3408B TA 500-540HP
 CAT 3408E TA 585HP and 700-800HP tuned
with straight pipe sound
-Replaced jake brake with CAT brake saver
-New Improved sound attenuation for realistic sound fade off and distortion effects
-Custom sound orientation for realistic sound from different angles
-Custom exhaust distortion for realistic exhaust tone 
depends on throttle pressed, rpm and works along with sound attenuation
-Included Customizable Additional Supported Trucks (CAST) in the mod
If you don't know what CAST is :
https://steamcommunity.com/workshop/filedetails/discussion/665335536/3156453942274154402/

Quick tutorial on how to use CAST
1. Goto def/vehicle/truck/
2. Rename one of zcustom_xx into truck def name you want
(optional but should do)
3. get inside that folder/engine/
4. Open every 3408_xxx.sii files and look at line 3
5. change "3408_xxx.custom.engine" to "3408_xxx.(truck def name).engine" for every files in that folder
and you should good to go

Credits:
Slav Jerry - sound modding and samples