Cometic Pontiac 428 / 455 V8 4.380in Bore .060in MLS-5 Head Gasket - C5846-060

The Cometic Pontiac 428 / 455 V8 4.380in Bore .060in MLS-5 Head Gasket - C5846-060 is a precision-engineered head gasket with a 4.380" bore and .380" compressed thickness.

The Cometic 5-Layer Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring 5-Layer Multi-Layer Steel (MLS) construction, this gasket uses five embossed steel layers delivering exceptional clamping load distribution for high-output applications. Precision CNC-machined to exacting tolerances, this gasket seals combustion, water jackets, and oil passages simultaneously — eliminating the need for multiple gaskets or sealing compounds.

• Material: 5-Layer Multi-Layer Steel (MLS)
• Bore Size: 4.380"
• Thickness: .380" compressed
• Part Number: C5846-060

Verified fitment: Buick LeSabre (1975); Oldsmobile 88 (1975); Oldsmobile 98 (1975); Oldsmobile Custom Cruiser (1975); Pontiac Bonneville (1968–1978); Pontiac Catalina (1968–1978); Pontiac Executive (1968–1970); Pontiac Firebird (1968–1979); and 8 more.