The Cometic GM LSJ Gen-1 ECOTEC .060in MLS Cylinder Head Gasket - 87mm Bore - C5921-060 is a precision-engineered head gasket with a 87mm bore and .060" 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.
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Material: Multi-Layer Steel (MLS)
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Bore Size: 87mm
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Thickness: .060" compressed
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Part Number: C5921-060
Verified fitment: Chevrolet Cobalt (2005–2007); Saturn Ion (2004–2007).