I work for an aerial photography company so I've got access to some large-format photo printers. The ideal size for an image would be 10800x7200 px or greater so I could print a 36x24 inch poster at 300 DPI, but I'm doubting that too many people mosaic together pictures of E30s so just show me the largest you've got.
I'll start it off with the best I've been able to find:

5760x3840 px @ 300 DPI = 19.2x12.8 inches. Needs moar megapixels.
I'll start it off with the best I've been able to find:

5760x3840 px @ 300 DPI = 19.2x12.8 inches. Needs moar megapixels.