True Holley parts????????

You don't, do enough research... California is up to 15-17 %, & we pay more per gallon for it. Holley started shipping green treated accelerator pumps ,& matching gaskets, more than a decade ago. Del is spot on, here.

The pumps here is So Cal I fill up say "up to 10% ethanol".

Or do you mean gas cost 15-17% more here.