Scania V8 Open pipe with Exhaust valve system

About the function. This mod make your Scania v8 sound straight piped like other mods. But this mod have a drifferent, because you can close your exhaust valve to make engine sound quieter. But how to use or close exhaust valve? let's read instruction

1.Your engine volume must less than exhaust and turbo volume 50%.
2.If you want to close exhaust valve. You just mute exhaust and turbo sound.

Slavthailand,Kriechbaum,Bimo Wahyu Saputro

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