SKU: SKU: CGSPRO1010T-4300-040
The Cometic Pontiac 455 Big Block V8 Top End Gasket Kit - 4.300in Bore - .040in MLS Cylinder Head Gasket - PRO1010T-4300-040 is a precision-engineered head gasket with a 4.300" bore and .300" compressed thickness.
The Cometic Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers that conform to surface irregularities and maintain a positive seal. 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.
Verified fitment: Pontiac Bonneville (1970–1976); Pontiac Catalina (1970–1976); Pontiac Executive (1970); Pontiac Firebird (1971–1976); Pontiac GTO (1970–1973); Pontiac Grand Am (1973–1975); Pontiac Grand LeMans (1975–1976); Pontiac Grand Prix (1970–1976); and 3 more.