Cometic C5721-030 MLS Cylinder Head Gasket Buick Series II/III - 3800 V6 030

The Cometic C5721-030 is a high-performance multi-layer steel (MLS) cylinder head gasket engineered specifically for Buick 3800 Series II and Series III V6 engines. This precision gasket features a .030" (0.030 inch) compressed thickness and a 3.840" bore diameter, making it ideal for performance builds and applications requiring enhanced sealing capabilities.

Key Features:

• Multi-Layer Steel (MLS) construction for superior durability and heat resistance
• .030" compressed thickness provides excellent sealing with mild performance builds
• 3.840" bore diameter precision-engineered for Buick 3800 V6 engines
• Compatible with both Series II and Series III 3800 V6 engines
• Designed for use with RHS (Racing Head Service) cylinder heads
• Excellent for boosted applications and moderate compression increases

Cometic's MLS gaskets feature multiple layers of stainless steel with elastomeric coatings that provide exceptional micro-sealing properties. The gasket conforms to surface imperfections while maintaining superior combustion sealing under extreme cylinder pressures and temperatures. This makes the C5721-030 an excellent choice for turbocharged, supercharged, or naturally aspirated performance builds using the legendary GM 3800 V6 platform.

Application Note: This gasket is specifically designed for use with RHS aftermarket cylinder heads. Always verify bore size and compressed thickness requirements for your specific engine configuration.