Sea-Doo › Sea-Doo 1503/1630 4-Tec Top End Rebuild Kit (99.96mm Standard) Image 1 of 1 Sea-Doo 1503/1630 4-Tec Top End Rebuild Kit (99.96mm Standard) $546.83 Standard bore rebuild kit designed to bring engines back to factory spec performance. Add To Cart Added! Standard bore rebuild kit designed to bring engines back to factory spec performance. You Might Also Like Sea-Doo 1503 4-Tec Top End Rebuild Kit (.5mm Over) $745.71 Sea-Doo 1503 4-Tec Top End Rebuild Kit (1mm Over) $745.71 Sea-Doo 900 Top End Rebuild Kit (Standard 74mm) $565.43 Sea-Doo 1503 4-Tec Top End Rebuild Kit (.5mm Over) $546.83 Sea-Doo 580 Top End Rebuild Kit (.25mm Over) $238.56