2004 998S FE, 2017 KTM450EXC
Thanks DesmoDog, I wouldn't quite have the skills (or access to resources) like you do! It sounds like I should probably either do what you did (get a secondhand set off eBay to convert) or just buy some Termi's. It might be better to leave my stock ones alone just in case I ever have to pop them back on the bike. I really appreciate all your advice - cheers.I ran a new chip that converted the bike to single injectors and had it dyno tuned by, um, for cripe sakes I've forgotten who tuned it. Probably Ducati Detroit? Nicest running Ducati I've ever owned when it was all said and done. I also had a set on slip on Termis for it that I never got around to installing.
As for not sounding like a Termi... there is no magic to Termi mufflers. If you copy their perf pattern and use the same size tubes you will get the same sound. The prototype shop I mentioned existed purely to build exhaust systems BTW - I used to design OEM automotive mufflers for a living. I'm pretty sure Duc96cr knows the place I'm talking about... ;-)
FWIW I did it to a spare set of stock cans I got off eBay. I don't even recall what year/model they were off of now as it didn't matter, I only wanted the outer shells. The muffers I used were not straight through but I would expect the internals to be different between years/models.