420256606 Valve Seat Sleeve for Sea-Doo RXT X 1630 300 2016-2023

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve, OEM cross-reference 420256606, is a replacement cylinder head component that presses into the head to give the valve a durable wear surface on 1630 engine platforms.

Overview

This valve seat sleeve for Sea-Doo is a precision-machined insert that restores the valve seating surface in the cylinder head of the 1630 engine. It is built to hold valve alignment and seal compression so the engine can breathe and fire correctly. This valve seat sleeve suits riders and technicians rebuilding or refreshing the top end of a 2016-2023 RXT X 300.

Built For Performance

• Direct replacement for OEM part number 420256606
• Machined seating surface for proper valve seal and alignment
• Designed for the 1630 engine used in 2016-2023 RXT X 300 models
• Withstands the heat and load cycles of a supercharged marine engine
• Install-ready for cylinder head service and rebuild work

Fits These Machines

• for Sea-Doo RXT X 300 1630, 2016-2023

On-The-Job Use

• Cylinder head rebuilds after valve or seat damage
• Top-end refreshes during engine service
• Marine engine repair shops handling 1630 powerplants
• Preventive replacement while the head is off the machine

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, it is a replacement valve seat sleeve built to match OEM part number 420256606. Always confirm your machine's part number before ordering.

Q: How many sleeves do I need? A: Order one sleeve per valve seat being replaced. Check the cylinder head during disassembly to see how many seats need service.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.