Sea-Doo Jet Pump Assembly | 2001 GS | 2001 GSX RFI | 2001 GTI | 2001-2002 GTX RFI | 139.5mm Pump Housing. This assembly is a bolt in replacement for your damaged pump housing. Included are the Pump Housing, the jet pump rebuild kit (all the bearings and seals) and an impeller shaft. See "Product Description" for complete application list with years and models.