Its a sterline engine model which is assembled using 31 parts. Each part and assemby sldprt file attached and also provided STEP file which will be open any solidworks version or 3ds max.
STL (Stereolithography, filesize: 5.03 MB), STP (STEP, filesize: 4.62 MB), SLDPRT (SolidWorks, filesize: 13.9 MB)