Cometic C5712-051 MLS Cylinder Head Gasket Pontiac Bore - 400/428/455 V8 4.300

The Cometic C5712-051 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Pontiac 400, 428, and 455 cubic inch V8 engines. This gasket features a 4.300-inch bore diameter and a compressed thickness of .051 inches, providing exceptional sealing capability for both stock and modified engine applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.300-inch bore diameter optimized for Pontiac big-block V8 engines
• .051-inch compressed gasket thickness
• Engineered for 400, 428, and 455 cubic inch Pontiac V8 applications
• Handles high cylinder pressures in performance and racing applications
• Provides excellent rebound characteristics and combustion sealing

Cometic MLS gaskets utilize multiple layers of stainless steel with specialized coatings to create a superior seal that withstands extreme temperatures and pressures. The embossed layers allow the gasket to adapt to minor surface imperfections while maintaining consistent clamping force across the entire sealing surface. This gasket is ideal for street performance, racing, and boosted applications where reliable head sealing is critical.