It is a work of art, I wish I could take credit, I had the flange machined on a CNC by my machainist, then my guru welder made a jig off an original header pipe supplied by Ross Campbell on here. The pipe is hydroformed out of flat sheet [same grade as they make aircraft exhausts out of] and made into a long S shape, it is then cut up into the right shape and tig welded together, then they made all the little brackets, if you saw the finished product you would want one just to put in your china cabinet. It fit's YZ250B and 360B, the header is always cracked and burn't out and almost impossible to buy NOS or a decent 2nd hand one. The rest of the exhausts on these are usually OK. I will be selling the flanges separate as every aftermarket exhaust made for these and the YZ250/360A models have a basic pipe that fits over the barrel spigot and they never seal, you can just shorten the pipe flange and weld it on, it seals on 2 O-rings just like the factory one.
...pm me if you want one....Aussie quality at it's best.