Closed Engine Jet Exhaust question

[CVX20]

Hi gang
What do you think of this kind of exhaust vs logs on a closed engine jet boat. Will they work well with jet boat plumming and are they worth the big investment?
http://i34.photobucket.com/albums/d117/wickedrister/eeb4_01.jpg
Thanks Fred!

[ck7684]

They flow better but look worse than polished logs. My buddy has a Glastron Carlson with a 460 and it has that style exhaust manifolds...

[sleekcrafter]

I ran GIL BIG GUNS on my jet boat for any years, they were no wider than the original logs. I removed the dump hose, and used the manifolds to pre-heat, the engine, then dumped the engine water into the risers. Here is a picture of it from my buddies site.
http://ats-inc.net/bajajet/bajapics/9-10-3WB.gif

[jetboatperformance]

I got EMI's on my big boat (vdrive) and love them ,mine like sleekcrafters were the same width as the logs + or - ,they still however have some cam choice limitations ,depending on "tailpipes"/water entry ! Tom
http://i147.photobucket.com/albums/r319/jetboatperformance/Eliminator%20V-drive/MVC-038S.jpg