Cometic C9577 Heavy-Duty Rocker Cover Gasket for 1999 and Later Harley-Davidson Twin Cam Engines, 10-Pack

Rocker Cover Gasket

Material: Viton

Thickness: .020"

OEM 1738699A

Made in USA

The Cometic C9577 heavy-duty rocker cover gasket is designed for 1999 and later Harley-Davidson Twin Cam engines. This replacement gasket helps create a dependable seal between the rocker cover and cylinder head, supporting proper oil containment and helping prevent leaks during routine operation or engine service. Its application-specific design makes it a practical choice for rebuilds, maintenance, and replacement of worn or damaged rocker cover gaskets.
The C9577 gasket is manufactured with a .020-inch compressed thickness to provide consistent sealing performance when installed on clean, properly prepared mating surfaces. Cometic gaskets are widely used for their application-focused construction and dependable fit, making this 10-pack suitable for professional technicians, engine builders, and enthusiasts who want replacement gaskets available for multiple service intervals or engine projects.
This Cometic rocker cover gasket is supplied as a 10-pack and is intended for use as a direct replacement component where the specified application and gasket requirements match. Always verify engine year, model, cover configuration, and installation procedures before fitting. Follow the engine manufacturer’s torque sequence and use appropriate surface preparation to support a reliable seal.

Features:

• Brand: Cometic

• Part Number: C9577

• Application: 1999 and later Harley-Davidson Twin Cam engines

• Product Type: Heavy-duty rocker cover gasket

• Compressed Thickness: .020 inch

• Quantity: 10 gaskets per pack

• Use: Replacement and engine rebuild applications

• Sealing Function: Helps contain engine oil and prevent rocker cover leaks