They could be the TRC models
They could be the TRC models. Good luck with the search.
Looking at the rivet area looks like a custom home made job??
it looks like an RS-3 with an R-77 endcap repainted black and they some how put the from busa encap/heatguard on it...
I actually put the stock heat shield on there. Not sure if I like the whole setup yet, may have to break down and get a new set. It definitely has had some sort of modding or something. I love how it sound though!