On the OEM ZX-14R headers, the metal tube's between cyls 1/2 and 3/4 are brace's and do not have crossflow.
ie; Each brace has a hole drilled in the bottom and are not open to the head pipes.
If you have the capability to weld SS it will be simple to remove the Bung tubes.
Dimension explanation; When I installed my headers, I bought headers from a 2006 ZX-14 and a 2012 ZX-14R so that I could compare.
I opted to use the 2006 headers as they had 1/4 and 2/3 pairing like a Concours and head pipe dia that is a closer match to the ones on a C-14. The bike runs very well now and I'm happy with the set up.
NOTE: I have Steve's MRP flash in my ECU.
Now that Delkevic is offering these {which are basically ZX-14R copies} it makes me wonder if I made the right choice.
So, I'm watching to see what folks think about the Delkevic set up and how successful Steve is as he develops a Flash for them..
{shhhh, Don't tell my wife}
Ride safe, Ted