I have 2 1.7 / 1.8 exhaust mufflers. The one pictured is a factory german Leistritz muffler assembly. All 6 of the mounting studs are in good condition. I recently drove the 914 that it was removed from and the exhaust is good. There are two dents on the backside of the muffler otherwise no other issues. I also tried to take a close up picture of the name of the muffler and part number but the picture did not come out very well. The internal baffle appears to be in good shape with no internal rust that I'm aware of. $100 plus shipping
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I also have another exhaust is an aftermarket Bursch unit. It is still installed on the engine and heat exchangers. I hope to have it off in the next day or so and will post pictures of this one as well. Click to view attachment