Posted by Jarl on Tuesday, April 20, 2004 at 10:04PM :
In Reply to: ot turbo cummins question posted by dave on Tuesday, April 20, 2004 at 8:21PM :
I think you are refering to the "silencer ring" as best I can tell, removing this ring makes the turbo sing a little louder. It serves no other purpose other than noise supression...
http://www.turbodieselregister.com/
http://www.dieseltruckresource.com/dev/index.php
Here are a couple of sites you can use to do a little more research