imo all of honda's engines are performance engines, even our despised SOHCs
jdm d15b 3 stage vtec = 87 hp per liter N/A
And that engine also utilizes vtec-e and has the ability to be tuned to lean burn for afr's around 22-25:1 low load cruising for uber economy
If you want power you need to have forced induction, I/H/E aren't even worth it for n/a imo. Why spend all that money for maybe 25hp when for about the same price you can piece together a turbo setup that will double your stock number while upping the overall efficiency of your engine and allowing you to run longer gears.
And stock d series rods are fine to 250whp
