✓ 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: 68-9847F
Cometic Evo Big Twin EST Complete Gasket Kit - Harley & Indian Evolution Big Twin
$353.56
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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 undertaking a full engine overhaul on your Evolution Big Twin, a comprehensive and high-quality gasket kit is non-negotiable. The Cometic Evo Big Twin EST Gasket Kit delivers every gasket, seal, washer, and o-ring you need for a complete and reliable rebuild.
Why riders pick this
- Complete engine overhaul kit for Evolution Big Twin
- MLS head gaskets for robust, leak-free sealing
- Steel Viton-coated base gaskets resist heat and wear
- Blue Viton valve stem seals for optimal oil control
- Includes all necessary gaskets, seals, and o-rings
This Cometic Evo Big Twin EST gasket kit is specifically designed for Evolution Big Twin engines, ensuring a precise fit and optimal sealing. It features Multi-Layer Steel (MLS) head gaskets and steel Viton-coated base gaskets, engineered to handle the demands of both stock and modified V-twin powerplants.
Modern Materials for Classic Engines
- MLS head gaskets provide superior sealing under extreme conditions
- Steel Viton-coated base gaskets offer enhanced durability and resistance to leaks
- Blue Viton valve stem seals ensure reliable oil control and extend engine life
- AFM material components for precise and long-lasting seals throughout the engine
- Complete kit includes all gaskets, seals, washers, and o-rings for a full overhaul
Confidence in Your Evo Big Twin Rebuild
Proper engine sealing is fundamental to performance and longevity. This Cometic gasket kit eliminates guesswork by providing a complete set of high-quality components for your Evolution Big Twin. Ensure your Harley-Davidson or Indian Motorcycle runs strong and leak-free by choosing Cometic for your next engine rebuild.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9847F
- Weight: 1.71 lbs
- Kit Type: Complete gasket and seal set
Common questions
What is included in this Cometic gasket kit?
This complete kit provides every gasket, seal, washer, and o-ring needed for a full engine overhaul on Evolution Big Twin EST engines, including MLS head gaskets, Viton-coated base gaskets, and AFM components.
Is this gasket kit compatible with Twin Cam or Milwaukee-Eight engines?
No, this kit is specifically designed for Evolution Big Twin EST engines. Twin Cam and Milwaukee-Eight owners will need different part numbers. Please verify your engine type before ordering using our Shop by Bike tool.
What materials are used for the head and base gaskets?
The head gaskets are constructed from Multi-Layer Steel (MLS) for durability and superior sealing. The base gaskets are steel with a Viton coating, providing excellent heat and chemical resistance.
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 | 68-9847F |
| WEIGHT | 1.71 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?
