11004-3721 Head Gasket for Kawasaki STX 160X 1500 2020-2026

Head Gasket for Kawasaki

This head gasket is a replacement sealing component that fits between the cylinder head and engine block to maintain compression on the Kawasaki STX 160X 1500, and it cross-references OEM part number 11004-3721.

Overview

This head gasket is designed to seal the combustion chamber on the Kawasaki STX 160X 1500, keeping coolant and compression contained under the demands of marine use. It is a direct replacement for the factory sealing layer and is intended for riders performing top-end service or a rebuild. The head gasket for Kawasaki matches the original fitment and is built to handle the heat cycling that comes with regular jet ski operation.

Built For Performance

• Multi-layer construction designed to withstand high cylinder pressures
• Precision-cut to match OEM 11004-3721 port and bolt hole layout
• Heat-resistant material suited for marine engine operating temperatures
• Compression-sealing design to prevent blowby between head and cylinder
• Consistent thickness for proper deck clearance and torque values

Fits These Machines

• for Kawasaki STX 160X 1500 2020
• for Kawasaki STX 160X 1500 2021
• for Kawasaki STX 160X 1500 2022
• for Kawasaki STX 160X 1500 2023
• for Kawasaki STX 160X 1500 2024
• for Kawasaki STX 160X 1500 2025
• for Kawasaki STX 160X 1500 2026

On-The-Job Use

• Top-end rebuilds on the Kawasaki 1500 engine
• Cylinder head removal and reinstallation work
• Compression restoration on aging jet ski engines
• Routine maintenance after overheating events

Specs At A Glance

Good To Know

Q: How do I know if my head gasket needs replacing? A: Common signs include loss of compression, coolant mixing with oil, or overheating. A leakdown or compression test can confirm the head gasket is the source.

Q: Does this gasket require new head bolts? A: Many marine engine head bolts are torque-to-yield and should be replaced alongside the gasket. Always follow the factory torque sequence and specs during reassembly.

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