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Oct 17, 2025
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COMETIC
SKU: 68-9277
Cometic Evolution Big Twin Rocker Box Cover Gasket 5-Pack - Harley Evolution Big Twin
$120.000,00
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IN STOCK
— Ships within 24 hours
Free Shipping on orders $99+
Best Value Guarantee
30-Day Returns — see policy
Authorized Dealer — sourced direct
About Cometic
Cometic Gasket manufactures multi-layer steel head gaskets and complete gasket kits in Concord, Ohio. On a built V-twin running higher compression or a big-bore kit, the MLS head gasket is what keeps the top end sealed — which is why Cometic is the default spec on so many engine builds.
The Cometic rocker box cover gasket for Evolution Big Twin engines is a direct OEM replacement, designed to provide a consistent and reliable seal. Sold in a convenient 5-pack, these gaskets are essential for preventing leaks under the heat and pressure of V-twin operation.
Why riders pick this
- OEM-spec rocker box cover gasket
- For Evolution Big Twin engines
- 5-pack quantity for service and spares
- Prevents oil leaks from rocker boxes
- Direct replacement for stock parts
A properly sealed rocker box is critical for preventing oil leaks and maintaining the cleanliness of your Evolution Big Twin engine. Cometic delivers a high-performance gasket engineered to meet OEM specifications, ensuring your top end stays sealed tight, ride after ride.
Reliable Sealing for Your Evo Big Twin
- Direct OEM replacement for Evolution Big Twin rocker box covers
- Engineered for consistent sealing under demanding V-twin conditions
- Convenient 5-pack quantity for service and stocking spares
- Helps prevent oil leaks and maintain engine integrity
Essential for Peak Performance
Whether you're performing routine maintenance or a full engine rebuild, using quality gaskets is paramount. This Cometic 5-pack of rocker box cover gaskets ensures your Evolution Big Twin runs without unsightly and performance-robbing leaks, keeping your focus on the road ahead.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9277
- Weight: 0.16 lbs
- Quantity: 5 per pack
Common questions
Will this gasket fit my Evolution Big Twin engine?
Yes, this Cometic rocker box cover gasket is a direct replacement for Harley-Davidson Evolution Big Twin engines, ensuring proper fitment and sealing.
How many gaskets are included in this pack?
This product comes with five gaskets per pack, which is ideal for shops, multiple engine services, or keeping spares on hand for future maintenance.
Is this the same as the OEM Harley-Davidson part 17356-84A?
Cometic manufactures this gasket to match OEM specifications, making it a direct replacement for Harley-Davidson part number 17356-84A, ensuring equivalent performance and fit.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| 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
