Cummins Small Cam Straight Pipe Sound for American Truck Simulator
The 1970s Cummins Small Cam engines (NT, NTA and NTC 855) with a straight-pipe exhaust for SCS and modded trucks. Free, by Slav Jerry; version 1.0 from May 2026.
Download Cummins Small Cam Straight Pipe Sound
More screenshots on Steam Workshop ↗
What this mod does
Cummins Small Cam Straight Pipe Sound is another sound mod by Slav Jerry, the author behind some of the most popular straight-pipe engines in ATS. This time he recreates the Cummins 855 «Small Cam» family, the engine of 1970s trucks, with an open exhaust and no muffler.
Engines included
- NT855 at 335 hp.
- NTA855 from 370 to 400 hp.
- NTC855 from 290 to 350 hp, plus a 290 Formula variant.
Sound effects
- Gearbox whine.
- Attenuation: the exhaust fades realistically with distance.
- Distortion and directional effects that change depending on where you are around the truck.
Compatibility
It’s designed for SCS and modded trucks; the tags mention Freightliner, Kenworth, Mack and Peterbilt. In the comments, the author explains that none of Jon Ruda’s trucks fit a Small Cam and that, being a 1970s engine, it’s deliberately less powerful than the Big Cams. If you want more power, the same author made the straight-pipe Cummins Big Cam IV.
Version
Version 1.0 was released on May 22, 2026, around ATS 1.59. The author doesn’t list a game version or load order. Credits: Slav Jerry (sampling, mixing and mastering) and IMC (engine specs).
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User rating
Highlights and things to keep in mind
- Classic engine rarely seen in ATS
- Three variants with several power ratings
- Very small file (2.4 MB)
- No game version listed
- Low power by design
- No engine fan (users are asking for it in the comments)
Requirements
- American Truck Simulator (no version listed; released in May 2026, around 1.59)
- Steam account
- No DLC required
- A truck that supports vintage Cummins engines
How to install it
- Open the "Cummins Small Cam Straight pipe sound" page on Steam Workshop and click "Subscribe".
- Launch American Truck Simulator and wait for Steam to finish downloading the mod.
- In your profile's Mod Manager, enable "Cummins Small Cam Straight pipe sound".
- Go to a service shop and pick one of the NT, NTA or NTC855 engines for your truck.
Version history
-
1.022 May 2026Current
First version
Common problems
What power ratings does it include?
NT855 at 335 hp, NTA855 from 370 to 400 hp and NTC855 from 290 to 350 hp, plus a 290 Formula variant.
Why is it so underpowered?
It's a 1970s engine, and the author deliberately made it weaker than the Big Cams.
Does it work on Jon Ruda's trucks?
The author says none of his trucks fit a Small Cam.
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