Cometic Evo Big Twin/Twin Cam Primary Housing Gasket - Only BIG Twin EA 1/PK Oe… — Harley-Davidson (2006-2017)

Cometic primary housing gasket for Harley Evo Big Twin and Twin Cam engines. OEM-grade replacement seal for the primary housing that prevents oil weeping at the engine-to-primary interface.

Features

• OEM-equivalent gasket design
• Engineered for Evo Big Twin and Twin Cam engines
• Single gasket per pack

Specifications

• Brand: Cometic
• Manufacturer Part #: C9145F1
• UPC: 191070001650
• Length: 13.2 in
• Width: 0.05 in
• Height: 0.3 in
• Weight: 0.24 lbs

Fitment

Fits Harley-Davidson Evo Big Twin and Twin Cam V-twin engines.

Frequently Asked Questions

Is this an OEM Harley gasket or an aftermarket replacement?

Cometic manufactures this to OEM specifications as a direct replacement. It is not the original Harley part but meets the same sealing standard.

Will this fit my Twin Cam engine?

Yes — this gasket is designed for both Evo Big Twin and Twin Cam primary housings.

Do I need to replace the gasket if I'm just changing primary oil?

Not necessarily, but if you notice oil seeping at the primary housing, replacement is recommended during your next primary service.

What's included?

One gasket per pack with mounting instructions.