The Cometic Mill Tech Twin Cam 4.250in Bore H&Bkit .030inH/G,.020inBase - C9926-E030 is a precision-engineered head gasket with a 4.250" bore and .250" compressed thickness.
The Cometic premium head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Built with Cometic's premium materials, this gasket meets or exceeds OEM specifications for durability and sealing performance. 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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Bore Size: 4.250"
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Thickness: .250" compressed
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Part Number: C9926-E030