Cometic C4321-080 MLS Cylinder Head Gasket for Nissan RB26DETT 88mm Bore

The Cometic C4321-080 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for the Nissan RB26DETT engine. This gasket features an 88mm bore diameter and 0.080-inch compressed thickness, making it ideal for street performance and mild forced induction applications.

Key Specifications:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 88mm bore diameter to accommodate stock and mildly overbored RB26DETT engines
• 0.080-inch (2.03mm) compressed thickness for precise compression ratio tuning
• Embossed stainless steel layers with FKM (Viton) rubber coating
• Designed to withstand extreme cylinder pressures in turbocharged applications
• Reusable design allows for multiple installations when properly maintained

About MLS Technology:

Cometic's MLS gaskets utilize multiple layers of stainless steel with strategic embossments that create a superior seal around combustion chambers, coolant passages, and oil ports. The outer layers feature a Viton rubber coating that fills surface imperfections, while the solid steel core layers provide structural integrity and blowout resistance. This construction allows the gasket to move with the engine's thermal expansion and contraction, maintaining a reliable seal under extreme conditions.

Application:

This gasket is designed for the legendary Nissan RB26DETT inline-six twin-turbocharged engine found in the R32, R33, and R34 Skyline GT-R models. The 0.080-inch thickness is suitable for stock compression rebuilds and mild performance builds. For high-boost or highly modified engines, builders may select different thickness options to adjust compression ratios and achieve optimal performance.

Installation Notes:

MLS gaskets require proper surface preparation for optimal sealing. Cylinder head and block surfaces must be clean, flat, and have a surface finish of 50 RA or smoother. Follow manufacturer torque specifications and sequence, and use ARP head studs or quality head bolts for best results. No sealant is required with MLS gaskets.