420256606 Valve Seat Sleeve for Sea-Doo GTX LTD S/C 1503 2003-2004

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve is a replacement engine component that seats the valve in the cylinder head of 1503-series engines, cross-referenced to 420256606.

Overview

This valve seat sleeve for Sea-Doo is a precision-fit engine part that presses into the cylinder head to give the valve a durable seating surface. The valve seat sleeve helps restore proper valve sealing on 1503 engines used in the GTX LTD S/C platform. It suits riders and mechanics rebuilding or refreshing top-end components.

Built For Performance

• Cross-referenced to OEM part number 420256606
• Designed to seat valves in 1503-series cylinder heads
• Restores proper valve sealing surface
• Built to withstand combustion heat and cycling
• Fits supercharged 1503 applications

Fits These Machines

• for Sea-Doo GTX LTD S/C 1503, 2003-2004

On-The-Job Use

• Top-end engine rebuilds
• Cylinder head reconditioning
• Valve sealing restoration
• Supercharged 1503 engine service

Specs At A Glance

Good To Know

Q: What does a valve seat sleeve do? A: It presses into the cylinder head to provide a hardened surface where the valve seals against the head. This helps maintain compression and combustion sealing.

Q: Is this an original Sea-Doo part? A: No, this is a replacement valve seat sleeve cross-referenced to OEM number 420256606. Confirm it matches your engine and serial number before ordering.

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