I pulled off the headers to check them (all were OK) but I had water sitting in the bottom of the #3 tube on the port header of one engine when I pulled it. Turns out there is a baffle in the Corsa tailpipe to help prevent reversion and it let loose and was stuck in the diverter valve. I'm considering replacing the Corsa system with straight tailpipes. Anyone ever do this? Is there a tailpipe that will replace the Corsa Y pipe without any modifications?[ATTACH=CONFIG]532811[/ATTACH]

I removed the the silent choice welded up the holes and ran straight 3" stainless out the back I stopped it 1" from the tip of the tail pipe I can email you some pic's if you would like.

Thanks, but I'd like to only replace the tailpipe. Maybe the new Merc part number for the 565 would work. I don't want to mess with the existing thru-hull/muffler setup. The other option is to weld the piece back on, but I'm thinking this Corsa setup is prone to reversion.

I have seen what you are looking for but cant remember where. It is pretty much a diverter just with out the valve. No need to remove the y pipe