What you’re looking at is the exhaust header mounting pin holes on the BMW R1100RS engine cylinder head. The engine as told by the guy who sold it to me is from 2001 (Don’t know how confirm this). The pins seem to have been drilled out and one of the holes completely fallen apart. So now my pickle is how to get this sorted. I could opt out just to look for cylinder heads, which are in better shape, however, the guy told me, the cylinders apparently have been bored out to increase the power, so I guess the rings have been installed to match this. If I opt out to replace cylinder heads, that means I need to look for the heads in better shape, replace all the gaskets and deal with this “boring” situation. Other option is to install some kind of inserts in the drilled out holes and weld that cavity. From what I understand aluminium welding isn’t that easy to come by in London, UK… Then once welded, I would need, I guess to drill out and tap a new pin hole. Other side isn’t a better situation as it still has 2 snapped bolts inside and a failed attempt to drill out the third snapped bolt.