Sea-Doo Wear Ring (155 MM) GTX/Speedster/Sportster/Utopia/GTI/Islandia/Challenger/RXP/Wake 267000104 2003 2004 2005 2006 2007 2008 2009 All 155mm I.D. SeaDoo Jet Pumps with Metal Housings . The Seadoo wear ring aids in stopping speed-robbing cavitation in your worn jet pump. Our SBT Delrin wear rings and liners will restore the tight clearance to your impeller The SBT wear ring performs better and is more economical, which allows you to replace the wear ring every time you are doing work on the jet pump. SBT's Delrin wear rings are created as a replacement to OEM wear rings for your Seadoo. The Seadoo wear ring aids in stopping speed-robbing cavitation in your worn jet pump.