Originally posted by Bill
Looking at the pics above, there seems to be a large difference between intake runner port diameter. Are you going to have to open up the intake ports on the head a lot to accomodate the manifold?
i think this might answer your question.
Originally posted by 0HP930
Here is a port comparison to demonstrate why I will be doing some serious porting work to my heads now that I have a manifold to match them to. This will involve reaming my 34mm ports out to almost 40mm.
i'm thinking he said about 6mm port, but i'm just speculating...