[john marcella]

Originally Posted by JSPONT

It's the mass production, so many out there, and many to modify to flow well.
They are cheap, and work with off the shelf parts.

I'll start some more crap KRETTFMFER'S, DCITTFMFER'S LOL

It's not the mass production, it's the fact that competing heads that are design by people paying attention to a bunch of s*** that doesn't matter. Or solve one problem and create another or 2 or 5 .
So you get a head that is hardly better.

[ho428]

I always thought Edelbrocks were an Aluminum replacement street head, race heads started with the KRE D ports and went up from there.