No more headers?

[Exidor]

Just seen some external pics of the new
Holden SIDI engine.
It appers to have 1 exhaust port per bank
cast into the head.
Can anybody explain this system?

[andyman]

ive been told the exhaust and inlet ports come over the top of the cylinder or some whacky thing like that,

the single port is only on the 3.0 the 3.6 has the 3 ports