Originally Posted by alcoolaid
I would weld in 4 bungs
Small price to pay to know all 4 cylinders are equally happy.
Once you see where each cylinder afr wise and make your changes, as you tune the car afr wise off the main wideband the 4 in the primaries should all remain the same.
You'd be surprised at how much power you'll pick up and how much safer it would be on the engine.