anyone know this exhaust? Honda cb750 k. cross or x pipe?

[mark13018]

All the 750 guys on here!:
I originally thought this was the "x-pipe" when I picked this up in that 5 bike lot but I didn't look at it too closely with all the new bikes, I had my hands full. Finally getting around to this one, I took the exhaust off and it's completely different than I expected it. Cylinders 1&4 go to the right and cylinders 2&3 go to the left..

Just has the basic, slip on, slash cut, turn out, 2-1 mufflers on them which could be different from the header manufacturer.

Any help is appreciated. Thanks!

 

[Nebr_Rex]

In 1978 Kawasaki came out with the KZ650sr. The stock pipes on that machine were pared
according to firing order like the one pictured. At one time I had a set of those pipes on 750/4.
In a search for more power I switched to a 4/1 Mac. To my surprise the jetting did not need to
be changed and the bike ran the same. I do have a set of pared NOS aftermarket head pipes
for a KZ900/1000 and they a Jardines.

 

[Redbird]

My '78 CB750K came with similar pipes. It had actual mufflers on it though. Appeared to be a Mac set.