The International 8600 (in-game: Intrepid 8600) is a truck available in 18 Wheels of Steel series manufactured by the American truck manufacturer International.
The truck is featured in 18 Wheels of Steel: American Long Haul, and Haulin'.
The truck's sleeper version, named in-game Intrepid 8600 Sleeper is a same truck, but with a sleeper cabin, featured in 18 Wheels of Steel: American Long Haul and Haulin'.