Cometic C9791-040 Millennium Head & Base Gasket Kit 3-9/16" Bore .040" H/G .018" B/G

The Cometic C9791-040 Millennium Head and Base Gasket Kit delivers professional-grade engine sealing for V-Twin applications with a 3-9/16" (3.563") cylinder bore. This precision-engineered kit includes both head and base gaskets manufactured to exacting specifications for reliable performance in demanding conditions.

Kit Specifications:

• Cylinder bore size: 3-9/16 inches (90.5mm)
• Head gasket thickness: .040 inches (1.02mm)
• Base gasket thickness: .018 inches (0.46mm)
• Multi-Layer Steel (MLS) head gasket construction for superior sealing
• Precision-cut for exact fitment and optimal compression

Cometic Millennium Technology:

• Advanced MLS head gaskets feature multiple layers of embossed steel for exceptional durability
• Superior resistance to heat and pressure compared to traditional composite gaskets
• Engineered to handle high-compression and performance engine builds
• Manufactured in Concord, Ohio using American-sourced materials

Cometic Gasket has been the trusted choice of professional racers and engine builders since 1989, providing proven sealing solutions for automotive, powersports, and V-Twin applications. Whether you're performing a top-end rebuild, cylinder replacement, or big bore conversion, this Millennium kit ensures a leak-free seal between critical engine components.