SKU: SKU: CGSC15262-040
The Cometic Pontiac 389/421 V8 4.3in Bore .040in MLS Head Gasket - C15262-040 is a precision-engineered head gasket with a 4.300" bore and .3" 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 (1959–1966); Pontiac Catalina (1959–1966); Pontiac GTO (1964–1966); Pontiac Grand Prix (1962–1966); Pontiac Star Chief (1959–1966); Pontiac Tempest (1961); Pontiac Ventura (1960–1961).