I have done Google searches, searches on here and all I keep finding is as cast CC specs, nothing at all for flow numbers. I found some numbers for the smaller 19201807 small bore heads, but they are smaller all around. Anyone ever seen some flow sheets on the 19201805 heads?

 

Looks like a 260cc factory port with stock flow numbers. So just an ls3 head with thicker decks and 6 bolts maybe ?

 

I guess that would make sense. It's odd that I can find flow numbers on the small bore LS3 heads and even the LS7 heads both CNC ported and not, but no numbers on the LS3 variants.

I'm just going to go with that.

 

their specs basically call it a 6 bolt ls3 head

 

Cool. I will use those numbers then.