I created this combustion engine using blender 4.1. It has fairly good topology and is low poly with 2k textures that include Diffuse, Normal, Metal, Roughness and AO. I have included two Blender files that both have an animation included.
Native Formats: BLEND (Blender, filesize: 9.44 MB)
Exchange Formats: OBJ (OBJ, filesize: 1.4 MB), FBX (Autodesk FBX, filesize: 1.58 MB), 3DS (3D Studio, filesize: 756 KB), UNITYPACKAGE (Unity 3D, filesize: 3.09 MB), TEXTURES (Textures, filesize: 942 KB)