X Heads or J Heads???

EL5DEMON340 said

if the j is a 1.88 it can be enlarged to 2.02 plus the valve will sit up higher say then an x that has had a couple V/J's already, just be sure if you put a 2.02 in the head to have a plunge cut to open the bowl.

Click to expand...

There small differences, I like the early heads.

I dont see any later heads in ported form going much over 250cfm, meanwhile the older stuff nets 270's/280's.

I think if you know what you are doing 'porting wise' then to an extent/cfm level...you'll be fine with any of them.


Does anybody have any 587 heads ported flowing over 250-260's?

I'd like to see the flow sheet..