Sea-Doo › Sea-Doo 1503/1630 4-Tec Top End Rebuild Kit (100.96mm) Image 1 of 1 Sea-Doo 1503/1630 4-Tec Top End Rebuild Kit (100.96mm) $546.83 Oversize rebuild kit for 4-Tec engines requiring cylinder correction and performance restoration. Add To Cart Added! Oversize rebuild kit for 4-Tec engines requiring cylinder correction and performance restoration. You Might Also Like Sea-Doo 900 Top End Rebuild Kit (1mm Over, 75mm) $565.43 Sea-Doo 580 Top End Rebuild Kit (.5mm Over, 76.50mm 1992-1996) $180.20 Sea-Doo 580 Top End Rebuild Kit (.75mm Over, 76.75mm) $238.56 Sea-Doo 580 Top End Rebuild Kit (.25mm Over Platinum, 76.25mm 1992-1996) $197.38 Sea-Doo 900 Top End Rebuild Kit (.5mm Over, 74.50mm) $565.43