Cometic C8684 MLS Head Gasket Yamaha Bore Thickness - YZF-R6 68mm 0.027

The Cometic C8684 is a Multi-Layer Steel (MLS) head gasket engineered specifically for 2003-2005 Yamaha YZF-R6 motorcycles with a 68mm bore size. This precision gasket features a compressed thickness of 0.027 inches (0.686mm), providing optimal sealing performance for high-performance street and racing applications.

Multi-Layer Steel Construction:

• Multiple layers of stainless steel with advanced MLS technology for superior seal and durability
• Manufactured from premium fuel-resistant materials that resist creep, cracking, and brittleness
• Embossed stainless steel layers maintain clamping force under extreme thermal cycling
• Stopper layer design controls gasket compression and protects against over-torquing
• Accommodates minor surface imperfections while maintaining consistent seal

Performance Benefits:

• Excellent thermal resistance for high-RPM and boosted applications
• Reusable design allows for multiple engine assembly cycles during tuning
• Compatible with aluminum and cast iron cylinder heads
• Precise 68mm bore diameter ensures proper fitment and combustion seal

Cometic gaskets are trusted by professional engine builders and racers worldwide for their consistent quality and long-term reliability. This gasket provides a cost-effective solution for engine rebuilds, performance upgrades, or racing applications where precision sealing is critical.