Detroit Diesel 6-71 Straight Pipe Sound for American Truck Simulator

What this mod does

Detroit Diesel 6-71 Straight Pipe Sound recreates one of the most recognizable engines in trucking history: the two-stroke Detroit 6-71, with its high-pitched, steady sound. Slav Jerry offers it with a straight pipe exhaust for classic modded trucks.

What it includes

• Detroit Diesel 6-71 from 230 to 310 hp.
• Marine 6-71TI version.
• Exhaust stack effects.
• Realistic distance attenuation and directional effects based on your position around the truck.

Compatibility: modded trucks only

The author warns that it doesn’t work on any SCS truck without editing its .def files. In the comments he explains that compatibility depends on each modded truck and that sometimes you also need to edit its .def files. Users try it on classics like the International Fleetstar 2030A or the Kenworth K100, and one warns that it gets very loud on long trips.

Version

It was released on January 23, 2026, during the ATS 1.57 era, and has had no updates since. The author doesn’t list a game version. All the sound work (samples, mixing and mastering) is his own. If you’d rather have a modern Detroit with a stock sound, check out the same author’s Detroit Diesel DD Series Stock Sound.

Requirements

• American Truck Simulator (no version listed; released in January 2026, 1.57 era)
• Steam account
• A classic modded truck that supports the engine (or editing its .def files)

How to install it

1. Open the “Detroit Diesel 6-71 Straight pipe sound” page on Steam Workshop and click “Subscribe”.
2. Launch American Truck Simulator and wait for Steam to finish downloading the mod.
3. In your profile's Mod Manager, enable “Detroit Diesel 6-71 Straight pipe sound”.
4. Check whether your modded truck supports it; if not, the engine would need to be added to its .def files.
5. Go to a service shop and fit the 6-71 or the 6-71TI.

Version history

1. 23 Jan 2026Current

   Release (1 changelog note)

Common problems