Cometic Harley-Davidson 99-Up Motor Only Kit 110inT/C 4in Bore .030inH/G & .020inB/G - C9139-BG

The Cometic Harley-Davidson 99-Up Motor Only Kit 110inT/C 4in Bore .030inH/G & .020inB/G - C9139-BG is a precision-engineered head gasket designed for a 4" bore.

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.

• Bore Size: 4"
• Part Number: C9139-BG