BRP SkiDoo / SeaDoo Replacement RAVE Exhaust Valve Piston Fits MOST 1996-2014 Models 290253257, 290854447, 420253257, 420253258, 420854447, 420854448 & 420854449 Fits MANY GSX GTX LRV RX SPX XP Challenger Speedster Sportster Fits MANY Expedition, Formula, Grand Touring, GSX GTX Mach MXZ MX-Z Skandic Summit Ships Next Business Day or Sooner Please verify your Ski-Doo or Sea-Doo use one of the parts above before ordering.