hey anyone have a set of emi stainless risers I can borrow? I want to have some custom ones made a little longer so I need a pair to mesure off....anyone in west Michigan have theres out?

Dyno,
What is the clearance between the inner exhaust pipe and the outer water jacket? Typically on a riser like that, how big of a space is the water passage?

Not sure......Talked to my engine guy today and changed plans he wants dry stacks through the transom so I'll have to wait to install the engines to measure and get them perfect....