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Oct 17, 2025
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COMETIC
SKU: 68-9277
Cometic Evo Big Twin Rocker Box Gasket - Cover EVO 5/PK Oe#17356-84a — Harley-Davidson (1984-1999)
$38.61
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Cometic rocker box gasket for Evo Big Twin engines, a direct OEM replacement (part 17356-84A) sold in five-packs. Engineered for modern high-performance V-twin applications where consistent sealing under heat and pressure is critical.
Features
- 5-pack quantity
- OEM equivalent to Harley part 17356-84A
- Direct rocker box cover gasket
Specifications
- Brand: Cometic
- Manufacturer Part #: C9277
- Weight: 0.16 lbs
- Quantity: 5 per pack
Fitment
Fits Harley-Davidson Evo Big Twin engines and compatible V-twin motorcycles using OEM rocker box cover gaskets.
Frequently Asked Questions
Will this fit my Evolution Big Twin?
Yes — this is a direct replacement for Harley rocker box cover gaskets on all Evo Big Twin engines.
How many gaskets are in a pack?
Five gaskets per pack — enough for multiple rocker boxes or to keep spares on hand for future service.
Is this the same as Harley OEM part 17356-84A?
Cometic manufactures this gasket to match OEM specifications as a direct replacement for Harley part 17356-84A.
Do I need sealant with these gaskets?
Check your engine manual. Most rocker box cover gaskets seat dry, but some riders apply a light gasket dressing for extra security.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9277 |
| WEIGHT | 0.16 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
