This mod is CAT C15 6NZ engine straight pipe for some SCS trucks and many modded trucks.
(Some SCS trucks will don't support because there's no C15 engine in real trucks, 
also if this mod doesn't work on any mod truck tell me so I can make it support that truck)

Version 5.0 Changelog:
-New exhaust load samples
-FAN SOUND!!!1!!1!!!1!!1
-General sound system improvement
-Fixed 600HP displayed on 625HP engine
-More compatible trucks
-Added optional mod function

Version 4.0 Changelog:
-Rebuilt the entire mod (again)
-Yeah that's pretty much it

Version 3.0 Changelog:
-Basically rebuilt the entire mod (Big thanks to Louisiana Truckspotting for sound recording)
-Included idle jake brake system
-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
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 is not compatible with the mods that have interior switches sound
(sound fixes pack is exceptional but put my mod on top piority)

Version 2.1 Changelog:
-Supported BSA Freightliner Classic XL

Version 2.0 Changelog:
-Updated for 1.42/1.43
-Rebuilded sound
-3 stages jake brake included (Note: sound from SCS Kenworth T680)
-Supported more trucks
-Better engine data

Version 1.2 Changelog:
-Reduced exhaust sound
-increased engine sound
-reduced turbo sound
-improved sound attenuation

Feature:
-CAT C15 6NZ 435, 500, 550, 595, 625 engines with straight pipe sound 
(625hp engine will replaced on SCS pete389 and kenworth w900)
-Smooth & Realistic engine & exhaust sound
-Custom sound attenuation for more realistic sound fade off

Credits:
Slav Jerry - sound modding
SCS Software - main sound samples and engine files
