Need help IDing this exhaust system

[1978GS750E]

Anyone have any idea what brand of exhaust system this is that was on my 1978 GS1000? The PO said it was a Vance & Hines but there is nothing on it that says V&H. The only marking is the muffler is stamped "Pro Sport".
IMG_0193.jpg

Also any idea what it is worth?

[timebombprod]

i believe its a vance & hines, probably an old one for sure. found this on ebay , yours had to have been spray painted thats why you cant find anything, maybe some random bolt holes where a name-plate would be.

its probably not worth a whole bunch you could shine it up or whatever to get a few extra bucks but that must be a old model exhaust.

[steve murdoch]

If it is solid, no rust, no dents, no road rash i would guesstimate $150.00.

Is the bike being parted out. Wheels for sale?

[1978GS750E]

No it's being restored!

[rphillips]

Not sure, but just doesn't look like a V&H. Could be, but to me, just doesn't look right. Not that it matters.

[1978GS750E]

Yeah, I don't think it is a V&H either. There are no holes in it anywhere for a nameplate. I've only seen a picture of one other bike with this exhaust. I believe it was in one of Trevors' posts. Maybe he will see this and chime in if he knows whose bike it was on.