“This is a detailed model of the original 1966 Porsche 911 flat-six engine, all internal parts move just like they do in the full-size engine – including the pistons, connecting rods, crankshaft, cam, valves, and rockers – the spark plugs are LEDs and you can see them illuminate to simulate spark timing.“

https://silodrome.com/porsche-911-engine-model/

Pelican has been selling these for quite awhile. They used to have specials on them at the toys and literature show. I wish it came with a shroud so it looked more authentic, still way cool!!