Hi, i had few requests for this, so i decided to update the sounds for the Sisu R500 by RJL.
This mod adds the Cummins N14 and Cat C15 engines sounds, and two 18 speeds gear boxes.
Author: Kriechbaum
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![Turkish Trucker Radio (Turk Tirci Radyosu) v3.0 [1.40 – 1.61.x]](https://ets2.lt/wp-content/uploads/2026/11/Turkish-Trucker-Radio-Turk-Tirci-Radyosu-v3.0-1.40-1.61.x-1-750x472.webp)


If this mod is for 1.23, you can update this sound for older versions.
Good sound, but it is available for you american truck, Peterbilt 379 and other ?
Thank