The bottom end of even the little B16 was good for around 700 with the addition of forged rods, pistons, and possibly a forged billet crank. Not too shabby from 1.6 liters.
The B16 was the production engine that really put Honda on the "tuner" map. At 160 HP stock, 300 on the street was a relatively easy accomplishment.
Honda engines' tunability is...much as I hate to use the word...legendary.
https://tuningpro.co/honda-b16-engine-guide/