Cometic C5403-098 MLS Cylinder Head Gasket 4.200" Bore .098" Thick Chevy SBC

The Cometic C5403-098 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered for Chevrolet Generation 1 Small Block V8 engines. This precision gasket features a 4.200-inch bore diameter and .098-inch compressed thickness, making it ideal for performance builds and engine rebuilds.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme conditions
• 4.200-inch bore diameter accommodates stock and slightly oversized cylinders
• .098-inch compressed thickness allows for precise compression ratio tuning
• Designed for aftermarket cylinder heads with undersized water ports for custom port matching
• Embossed stainless steel construction with Viton rubber sealing beads
• Compatible with Chevrolet Gen-1 Small Block V8 engines (265, 283, 302, 327, 350, 400)

Cometic MLS gaskets feature multiple layers of stainless steel with elastomeric coating, providing exceptional rebound characteristics and the ability to seal imperfect surfaces. The undersized water ports allow engine builders to customize coolant flow by matching ports to specific cylinder head configurations. This gasket is suitable for street performance, racing, and high-boost applications where OEM gaskets may fail.