I went above and beyond what you asked for, because, why not?

0-13B N/A massive ports and lightened rotating assembly

4-F20C w/ a turbocharger

6-S54 with the CSL carbon airbox and ITBs(E46 BMW M3 CSL)

8-Koenigsegg twin supercharged V8 whatever it's called

10-Lexus LF-A engine

12- Countach LP-546 for the sound alone.

16-Bugatti because you can't really find another 16 cyl engine haha.