This might sound like a dumb wondering. But i was looking at the megan exhaust manifold on an evo and i saw there are 2 bolts/plugs in between each pair of tubes. At first i thought, nice access for wb o2 or something.

But that's way to close to the block/pre-turbo to be for wb o2 isn't it?
Then i thought maybe for a pyrometer(egt)?

So really i'm wondering, what is the real purpose of those?

 

Those are anti-lag ports which we dont really use .