Exhaust again

So im looking for an exhaust. As far as pre-fabs go there really arent that many. Its really only like MAC exhausts. So seeing as the cb650 had the same engine as the 550 is it possible that exhausts between the two bikes are interchangeable? Anybody anybody? All input is appreciated. Thanks

it is likely that a system for a 550 would work bettter on the 650 than on the 550
many pipe builders use header sizes that are too big this is because it sells,
but too big does not make good all around power

I can never recall the SOHC engine design hierarchy, but it's possible that a CB500F or CB400F might work?