Cometic H3689SP2040S MLS Head Gasket - 0.040 Inch

The Cometic H3689SP2040S is a high-performance Multi-Layer Steel (MLS) head gasket designed to deliver exceptional sealing under extreme pressure and temperature conditions. Engineered for motorsports and high-performance applications, this gasket provides the reliable seal needed for demanding engines.

Advanced MLS Construction:

• Multiple layers of stainless steel for superior strength and durability
• Viton-coated outer layers provide excellent oil and coolant sealing
• Load-controlled embossments ensure even torque distribution across the sealing surface
• 0.040 inch compressed thickness for precise engine compression control
• Stainless steel construction offers corrosion resistance and rebound capability

Key Benefits:

• Ideal for aluminum heads to cast iron blocks or aluminum-to-aluminum applications
• Withstands shearing forces created by dissimilar metal expansion rates
• No re-torque necessary after installation
• Reduces bore distortion for improved engine performance
• Manufactured to match the demands of modern high-performance engines

Cometic gaskets are trusted by professional engine builders and performance enthusiasts across automotive, motorcycle, marine, and powersports applications. Each gasket is precision-engineered to provide a reliable seal in the most demanding conditions.