✓ VERIFIED
Oct 4, 2025
Rocker gaskets
Great qualities to these gaskets. Have used them extensively!
COMETIC
SKU: 68-9173
Cometic Evo Big Twin/Twin Cam Primary Housing Gasket - & Seal BIG Twin KIT — Harley-Davidson (2007-2011)
$120.35
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Cometic primary housing gasket and seal kit for Evolution and Twin Cam big twin engines. Factory-engineered to seal the primary cover without leaks under engine heat and pressure.
Features
- OEM-specification gasket design
- Fits Evolution and Twin Cam big twins
- Primary housing and seal included
Specifications
- Brand: Cometic
- Manufacturer Part #: C9173
- UPC: 191070004705
- Weight: 0.05 lbs
Fitment
Fits Harley-Davidson Evolution and Twin Cam big twin engines requiring primary housing gasket replacement.
Frequently Asked Questions
Will this fit my Sportster?
No — this kit is for Evolution and Twin Cam big twin engines. Sportster models use a different primary gasket.
What's included in the kit?
The primary housing gasket and seals needed for a complete primary cover installation.
Do I need to use a gasket sealant with this?
Follow Harley or your engine manufacturer's torque and assembly specs. Cometic gaskets are designed for direct installation without additional sealant unless specified.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9173 |
| WEIGHT | 0.05 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.73
11 RATINGS
5★
8
4★
3
3★
0
2★
0
1★
0
✓ VERIFIED
Sep 29, 2025
Cometic gaskets
I used james gaskets before i got cometic and they didn’t last long and had to pay someone to replace them again so I went with cometic and so far so good im going to stick with this brand from now on
✓ VERIFIED
Mar 18, 2024
Magical
This gasket worked perfectly! ALTHOUGH, it would not have been needed had the James Engine gasket set had the correct gasket. The bolt holes were large on the set(I suppose fore different engine applications) which introduced an oil leak issue after I rebuilt my engine. <br />The COMETIC GASKET fit my 103 perfectly and ...tada!..magically...no leaks!
✓ VERIFIED
Jul 7, 2019
Fits, works, looks like good material. Would use again if needed.
✓ VERIFIED
Apr 18, 2016
Great product. No extra material necessary and no leaks after using.
✓ VERIFIED
Oct 31, 2015
Great gaskets worked perfect. Prefer James gaskets but they were not available. Theses got the job done.
