- Torsion Springs x1
- Layered Plating x1
- Helical Gear x1
- Barrel x2
To unlock Internal Combustion Engine you need x1 each of previous mentioned items plus Artifact of Frames x1 and Artifact of Tanks x1
(From the Research Nexus, click on the Advanced Recipes button underneath the ingredient list. Select the artifacts and ingredients, and click Research.)
Crafting Material ImageEdit
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