This is my 1st SP GS-4 Whistle Replacement, this one uses a recording of SP 4449 by airailimages. Excerpted with permission from Airailimages YouTube Channel. The entire 4449 video may be viewed at: https://youtu.be/UrxPpKzsDn8

(How to install)

1. Open the SP4449Whistle.7Zip
2. Extract the Assets folder
3. Drag the Assets Folder into Steam/steamapps/common/Railworks
4. The whistle should now be installed!


While this works Flawlessly on my PC I have no responsibility for any damage/problems it may  cause for you


This package it released as freeware. AND MUST STAY AS FREEWARE.


By RocketStephen

You may contact me at rocketstephen4014@gmail.com

Have a great day!