Only some of them had shared ports. I know for sure the ones used in the later lesser Imprezas did. From the shape of the manifold, the gasket surface is just a round hole like the BMC, not like the Olds at all.
Cool, someone's heard of them.
Is a head swap out of the question?
I've...
I am sure they do have shared ports (I'm having trouble finding a picture myself). I'm unsure about how deep it goes in before it splits, however I'd prefer not go the weld route.
Wow, that is one odd looking header, interesting idea though. Doesn't help me too much unfortunately..
To get my problem across a little better...
my engine (drawn horribly in ASCII art) looks like:
front
____________
| 2 | O--||--O | 1 |
|----| || |----|
| 4 | O-||-O | 3...
I was wondering about the impact about the odd heads on my engine on header design. I have a (Subaru) H4 - 16v (gasoline, spark ignition, naturally aspirated) engine. The exhaust ports on each head are siamesed together. The firing order however fires left front, back, then right front, back...