what exhaust do i have on my z1

found the z1 apart in boxes, I have it 90% back. the 2 into 2 system connects cyl. 2 and 4 exits on the right. cyl 1 and 3 exit on the left . all factory welded and chromed. pipes will not separate from collectors

new to the forum. trying to add pics

had to use pic I found on the net but this is what I'm running

Maybe Jardine or Hooker, but those are just a couple of guesses.
Here's a KZR muffler topic with a bunch of photos. Header pics