Is there any hope in adding a Y-pipe and captain's call to a TRS drive that has never had exhaust run through it?

Can a Y-pipe even be obtained any more or would it have to be fabricated?

If there hasn't been an exhaust bellows installed in the past 20 years, is there any hope that the bellows will seal if you do install one?

Thanks!

All 330 and 370 TRS Packages came with thru prop exhaust. The 400/420/425/440/465 TRS packages came with thru hull only. There where 2 different style down pipes, the first for MCM trans models and the B/W trans models. The first one is 2 pieces 1 for port and 1 piece for stbd. The 2nd is 4 piece much shorter 2 port and 2 stbd. I have some left but need to know your transmission type and exhaust you are running. Additionally if your running a big camshaft reversion will be a problem.