Large Port Head

[Chambers_RS]

Will I get any benefit from fitting the large port Ph1?
Going ITBs with 421 and my PMS manifold.

Only asking as I’ve got it sitting here doing nothing and the engines coming out.

 

[markmcgivern]

It's been said bigger isn't always better with port sizes on these heads. People like pure motorsport specify small port heads on exchange, think ALD might have touched on this also but don't take my word for it.