funky old glasspacks HELP ID

found these on the inter-web. look cool. i dont know much about old mufflers and who did what back in the day. never seen that spiral design.

anyone help me out here? i might buy them. thanks!


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Exzostec was on Alondra in Paramount, CA as late as the 70's. I know they sponsored some Bonneville cars back then. Not sure when they went out of business but that label looks like it's from the late 70's early 80's

 

thanks.. well im still interested in the workings of the spiral baffle. any other companys use that design? different sound then a "standard" gl***pack?

 

Hurry up and get them installed and post a YouTube clip, I'm really interested in finding out how those sound.

 

ya ya! i havent even bought them yet! if you send me some stickers ill let you have the first showing of the clip!

 

I have 4 "NOS" mufflers and I am trying to see what they are worth as I have no use for them

 

Take pics, measurements, etc and post the question here:
https://www.jalopyjournal.com/forum/forums/whats-it-worth.95/