The Cometic 2019+ Cummins 6.7L ISB 4.327in Bore .054in MLX Head Gasket - C15266-054 is a precision-engineered head gasket with a 4.327" bore and .327" compressed thickness.
The Cometic MLX Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring MLX Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers for superior sealing under extreme cylinder pressures and temperatures. 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: MLX Multi-Layer Steel (MLS)
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Bore Size: 4.327"
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Thickness: .327" compressed
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Part Number: C15266-054
Verified fitment: Ram 2500 (2019–2021); Ram 3500 (2019–2021).