Cometic C9984 Multi-Layer Steel Head Gasket Set .040" Harley-Davidson Shovelhead

The Cometic C9984 Multi-Layer Steel (MLS) head gasket set provides premium sealing performance for Harley-Davidson Panhead and Shovelhead engines. This pair of gaskets features advanced three-layer construction engineered to deliver superior reliability and performance in demanding V-Twin applications.

Advanced Multi-Layer Steel Construction:

• Two outer layers made from embossed spring steel coated with Viton on both sides for exceptional chemical and heat resistance
• Uncoated stainless steel center shim layer provides structural support and can be varied for multiple thickness requirements
• Load Control Embossments (LCE) promote even torque distribution across the sealing surface
• Reduces bore distortion for improved piston ring seal and increased power output

Technical Specifications:

• Gasket thickness: .040 inch (1.02mm)
• Standard bore size: 3.500 inches
• Quantity: 2 gaskets per package
• Manufactured from premium fuel-resistant materials that resist creep, cracking, and brittleness

Replaces OEM Harley-Davidson part number 16770-66. Each gasket is manufactured in the USA using materials and processes designed to meet the demands of harsh sealing environments, varying load conditions, and different surface finishes.