The Gasket covers the CIS injector notch. The manifold goes right to the edge,Does not cover it. You're Call
Here are the manifolds 1. PMO tall, 2. PMO CIS about .75 taller than stock 3.Stock 4. R tall mag.
I would only buy the steel stacks, I have seen alot of melted plastic ones.
I thought PMO only used the steel ones?