Real World Flow Differences 2.08"/ 1.74" Valves vs 2.14"/ 1.81" Valves " Pictures Added"

Good exhaust ports...well...
Smaller throat and radiused.
Bigger valve, as mentioned will allow that.
You can 'with a big block dodge' apply that to the intake side in regards to the bowl shape. Sometimes it's not higher flow # as it is quality of airflow.. other times not.
What's it doing past the valve and how is the ssr/bowl effecting that. Certainties hold a tight set of ingredients/guidelines to be just that...but mostly...its still learning and unique to the mods done and that particular combo. I know ...blah blah blah... right.