Uploaded May 2022 | Updated September 2026, 6 hours ago

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This mod is Cummins ISM with straight piped sound for SCS and modded trucks

Version 1.0 Feature:
-Cummins ISM 280-500HP with straight piped sound
-Custom sound attenuation for realistic sound fade off with distortion effects
-Custom exhaust distortion for realistic exhaust tone and works along with custom attenuation
-Custom sound orientation for realistic sounds from different angles
-Realistic turbo behavior
-Included idle jake brake system
-Included Improved Customizable Additional Supported Trucks (CAST) in the mod
If you don't know what CAST is :
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
and you should good to go

How to use idle jake brake:
1. hold light horn button (J button) for 1 second, then release
2. tap light horn button once again, and idle jake brake should be engaged
3. Repeat the same process to turn off

Note: idle jake brake system will not work with some kind of interior sound mods

Credits:
Slav Jerry - sound samples, mixing and modding

Download link:
forum.scssoft.com/viewtopic.php?t=311055

Reference:
youtube.com/watch?v=yyiYZPTJDRo

My discord server: discord.com/invite/8pYHD2fuUT
Buy me a coffee: buymeacoffee.com/SlavJerry