✓ VERIFIED
Oct 17, 2025
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Perfect! Always in stock , easy order, affordable and fast shipping
COMETIC
SKU: 68-9278
Cometic Evo Big Twin Rocker Box Gasket - Cover EVO 5/PK Oe#17356-92 — Harley-Davidson (1984-1999)
$38.61
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Cometic Evo Big Twin rocker box gasket cover, sold in a 5-pack for shops or multi-engine service. Direct OEM replacement engineered to seal rocker box covers on Evolution Big Twin engines without leaking.
Features
- 5-pack quantity
- Direct OEM replacement
- For Evolution Big Twin rocker box covers
Specifications
- Brand: Cometic
- Manufacturer Part #: C9278
- Length: 8.05 in
- Width: 8.5 in
- Height: 0.55 in
- Weight: 0.05 lbs per gasket
Fitment
Fits Evolution Big Twin V-twin engines, including Harley-Davidson EVO models.
Frequently Asked Questions
What engine does this gasket fit?
Evolution Big Twin (EVO) engines found in Harley-Davidson and compatible V-twin motorcycles.
Why are these sold in a 5-pack?
Pack quantity is ideal for shops, multi-bike rebuilds, or riders who want spares for future service.
Is this the OEM Harley gasket?
Cometic manufactures this to OEM specifications as a direct replacement for the factory part.
Will this work on Twin Cam or Milwaukee-Eight engines?
No — this gasket is specific to Evolution Big Twin engines only. Different engine families require different part numbers.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9278 |
| WEIGHT | 0.05 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.69
16 RATINGS
5★
14
4★
1
3★
0
2★
0
1★
1
✓ VERIFIED
Jul 21, 2025
USPS damaged the gaskets
Came in USPS bent , I didn't use them and threw them in the trash after JP Cycle refunded me. I used my old ones and added gasket sealant to them.
✓ VERIFIED
Apr 18, 2025
It worked
Shipped super fast <br />Worked as it should
✓ VERIFIED
Sep 9, 2024
Great replacement gasket!
Great replacement for the OEM gasket. Fit perfectly and is a well made gasket.
✓ VERIFIED
Jun 2, 2024
packaging
The gaskets worked great, no more leaks, however the packaging could be better. The gaskets are metal and shipping them in an envelope makes for bent gaskets and crossed fingers hoping they won't leak.
✓ VERIFIED
Apr 18, 2024
When in need
A little expensive for two gaskets but worked as should
