This is 6 Meter Enclosed Race Car Trailer, i have file Autodesk Inventor, if you need i will give you !
STL (Stereolithography, filesize: 28.3 MB), OBJ (OBJ, filesize: 82.2 MB), BLEND (Blender, filesize: 67.8 MB), FBX (Autodesk FBX, filesize: 491 MB), STP (STEP, filesize: 55.3 MB)