✓ VERIFIED
May 16, 2026
not what I needed. description wasn't very clear but not worth sending back. oh well just have to be more careful next time
COMETIC
SKU: 68-9780
Cometic Twin Cam EST Complete Gasket Kit - Harley Twin Cam
$179.57
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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.
When it's time for a full engine refresh or a complete top-end job on your Twin Cam, this Cometic EST gasket kit delivers everything you need. It includes all the critical seals, gaskets, and O-rings to bring your V-twin back to spec. Designed for a complete engine overhaul, this kit ensures a reliable, leak-free build.
Why riders pick this
- Complete kit for full Twin Cam engine overhaul
- MLS head gaskets for reliable cylinder sealing
- Steel Viton-coated base gaskets for durability
- Blue Viton valve stem seals maintain consistent performance
- AFM material components for comprehensive sealing
This Cometic Twin Cam EST gasket kit is engineered to provide a comprehensive sealing solution for your Harley-Davidson Twin Cam engine. Every component needed for a complete engine overhaul is included, from head gaskets to valve stem seals, ensuring you have the right parts on hand for a professional rebuild. Don't compromise on critical sealing surfaces when performing maintenance or performance upgrades.
Engineered for Durability and Performance
- MLS (Multi-Layer Steel) head gaskets for superior sealing under demanding conditions
- Steel Viton-coated base gaskets offer enhanced durability
- Blue Viton valve stem seals provide consistent valve guide sealing
- AFM material components ensure a complete and reliable seal across all surfaces
Complete Overhaul in One Box
This all-inclusive kit eliminates the hassle of sourcing individual gaskets and seals, saving you time and ensuring compatibility. Whether you're refreshing a high-mileage engine or sealing up a fresh build, these components are designed to meet the rigorous demands of your Twin Cam. Confirm your specific model's fitment to ensure a perfect match for your next project.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9780
- Length: 7.7 in
- Width: 9.3 in
- Height: 2.15 in
- Weight: 0.875 lbs
Common questions
What is included in this gasket kit?
This kit contains all gaskets, seals, and O-rings necessary for a complete Twin Cam engine overhaul, including MLS head gaskets, Viton-coated base gaskets, and valve stem seals.
Will this kit fit my Harley-Davidson Twin Cam engine?
This kit is designed for Twin Cam EST engines. Please use our Shop by Bike feature to verify compatibility with your specific year and model before ordering.
Are these gaskets designed for high-performance applications?
Yes, Cometic gaskets, including the MLS head gaskets in this kit, are engineered to provide reliable sealing under the higher demands of performance V-twin engines.
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 | 68-9780 |
| WEIGHT | 0.88 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.36
14 RATINGS
5★
11
4★
0
3★
1
2★
1
1★
1
✓ VERIFIED
Mar 8, 2026
Gasket
Working fine was for my brother's bike
✓ VERIFIED
Oct 25, 2024
Works Fine at a lower cost
I usually have an OEM from Harley Davidson, I have used this twice on my 04 Electraglide, no leaks or issues. At a much lower price.
✓ VERIFIED
Jun 8, 2024
A mediocre gasket
I didn’t use this gasket after removing the derby and seeing the Harley gasket that I removed. No comparison in quality. I ended up going to the local dealer and bought an O.E. gasket.
✓ VERIFIED
Jun 6, 2023
A good buy
The gasket fit nicely and no leaks so far . The fitment was spot on .
✓ VERIFIED
May 4, 2023
There is nothing on them indicating they are actually Cometic gaskets. Are they Substitutes?
