Cometic Oldsmobile 370/371 Gen1 Rocket V8 .040in MLS Cyl Head Gasket-4.190in Bore-J2 Golden Rocket - C5129-040

The Cometic Oldsmobile 370/371 Gen1 Rocket V8 .040in MLS Cyl Head Gasket-4.190in Bore-J2 Golden Rocket - C5129-040 is a precision-engineered head gasket with a 4.190" bore and .040" 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.

• Material: Multi-Layer Steel (MLS)
• Bore Size: 4.190"
• Thickness: .040" compressed
• Part Number: C5129-040

Verified fitment: Oldsmobile 88 (1957); Oldsmobile 98 (1957–1958); Oldsmobile Fiesta (1957–1958); Oldsmobile Starfire (1957).