NEW SEA-DOO 4-TEC PISTON RING SET SIZE: STD. 99.96MM High quality piston ring set made by RIK in Japan This Set is for 1 piston Fits all Sea-Doo 4-tec non-supercharged and supercharged models Exact item is pictured Replaces OEM number: Ring Set 420-890-380 Fits the following Sea-Doo 4-Tec Models/Years: GTI ALL 2006-2011 GTX ALL 2002-2011 RXP / RXP-X 2004-2011 RXT / RXT-X 2005-2011 WAKE / WAKE PRO 2008-2011 CHALLENGER 180 / 210 / 230 2005-2011 ISLANDIA 2006-2009 SPORTSTER 2003-2006 SPEEDSTER 150 / 200 / WAKE 2004-2011 UTOPIA 2007-2009 WAKE 210 / 230 2010-2011