I share a two-bay garage with my upstairs neighbor (split-level house), and it would be a slight dis-service to state that he has "cars of interest"
His "daily driver" is a 350Z with a 80-shot (I think) bottle of nitrous.
His other car is a Miata that he and his cousin built (they own an imports race shop) for the express purpose of drag-racing others for money. They make a lot of money. Apparently this car will run high-9s in the quarter mile. He wouldn't let me take pics of the engine, but I can tell you that the turbocharger is as big as your head. The build quality is near-factory.
Like I said, no engine pics, but these pipes might give you some clue to the potential.