I'm putting my new die grinder to use. I've ported the swing valve very slightly, the turbine housing significantly, and now it's time for the stock exhaust manifold to go under the grinder.

I've opened up the outlet to the turbo in a big way as I really opened up the turbine housing. I've laid the back side of the flange back going toward cyl. #1 so that you can see very far back there and the gas from #1 and #2 will have a more fair shake. I think I'll leave #3 and #4 alone to an extent. You can see out of the manifold when you look directly through those two, so I figure they don't need much more help. I'll hog out #1 and #2 for all their worth.

What's your technique? Let's try to keep this one civil shall we? Of course, if it does come down to it, an old school NA MP long tube header is what I'll use when see you under the TU tent.