You may need Pepakura Designer or a standard PDF reader to view the layouts.
The file size is suspiciously small (e.g., under 1MB for a high-detail 3D model). 🏎️ Authentic Collector Resources
If you are actually looking for the physical model or history rather than a digital file, you can find authentic 1:43 scale versions from manufacturers like on collector sites like eBay . Did you find the link on a specific forum or community ? I can then provide specific instructions for that platform.