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Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.
Optimize your V-Twin engine's performance with the Cometic Gasket .020in rocker cover gasket. Designed specifically for Harley-Davidson Twin Cam engines, these gaskets are engineered to handle the increased cylinder pressures and extreme temperatures of modern high-performance builds. Made in the USA, Cometic gaskets provide a superior seal that prevents leaks and maintains consistent compression.
Modern lightweight engines require gaskets that can stand up to heavy-duty use. Cometic’s commitment to innovation ensures that every gasket in their library meets the rigorous demands of street and racing enthusiasts. Whether you are performing a top-end rebuild or routine maintenance, choose the reliability of Cometic. Find this and other premium engine components at GGCRACING.
…and 3 additional fitments. Contact us to confirm yours.
| Brand | Cometic Gasket |
|---|---|
| Manufacturer part number | C9577 |
| GGC SKU | CGSC9577 |
| UPC / GTIN | 191070004798 |
Use the manufacturer part number when you compare with other listings or ask us to confirm a match.
| Box size | 8.5 × 8 × 1 in |
|---|---|
| Shipping weight | 0.35 lb |
| Year | Make | Model | Trim |
|---|---|---|---|
| 1999-2017 | Harley-Davidson | FLHR Road King | Base |
| 1999-2006 | Harley-Davidson | FLHRCI Road King Classic | Base |
| 2000-2006 | Harley-Davidson | FLHRI Road King | Base |
| 2002 | Harley-Davidson | FLHRSEI Screamin Eagle Road King | Base |
| 1999-2009 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 1999-2005 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 1999-2006 | Harley-Davidson | FLHTCI Electra Glide Classic | Base |
| 1999-2006 | Harley-Davidson | FLHTCUI Electra Glide Ultra Classic | Base |
| 1999-2017 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 2001-2006 | Harley-Davidson | FLSTCI Heritage Softail Classic | Base |
| 1999-2017 | Harley-Davidson | FLSTF Fat Boy | Base |
| 2001-2006 | Harley-Davidson | FLSTFI Fat Boy | Base |
| 2000-2003 | Harley-Davidson | FLSTS Heritage Springer | Base |
| 2001-2003 | Harley-Davidson | FLSTSI Heritage Springer | Base |
| 1999-2010 | Harley-Davidson | FLTR Road Glide | Base |
| 1999-2006 | Harley-Davidson | FLTRI Road Glide | Base |
| 2000 | Harley-Davidson | FLTRSEI Screamin Eagle Road Glide | Base |
| 2001 | Harley-Davidson | FLTRSEI2 Screamin Eagle Road Glide 2 | Base |
| 1999-2010 | Harley-Davidson | FXD Dyna Super Glide | Base |
| 1999-2005 | Harley-Davidson | FXDL Dyna Low Rider | Base |
| 1999-2000 | Harley-Davidson | FXDS-Conv Dyna Convertible | Base |
| 1999-2008 | Harley-Davidson | FXDWG Dyna Wide Glide | Base |
| 2001 | Harley-Davidson | FXDWG2 CVO Dyna Wide Glide | Base |
| 2002 | Harley-Davidson | FXDWG3 CVO Dyna Wide Glide | Base |
| 1999-2005 | Harley-Davidson | FXDX Dyna Super Glide Sport | Base |
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