✓ 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: 68-9889
Cometic Evo Big Twin EST Gasket Kit - Harley Touring
$98.26
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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.
The Cometic Evo Big Twin EST gasket kit supplies every gasket, seal, washer, and O-ring needed for a complete engine overhaul on Harley-Davidson Evo Big Twin models. This comprehensive kit ensures reliable sealing under high performance.
Why riders pick this
- Every gasket, seal, and O-ring included
- MLS head gaskets for strong sealing
- Steel Viton-coated base gaskets
- Blue Viton valve stem seals
- AFM material for reliable performance
When undertaking an engine rebuild on your Harley Evo Big Twin, a complete and high-quality gasket kit is paramount. This Cometic EST kit provides all the necessary components for a full overhaul, designed to deliver a robust and leak-free seal. It's engineered with advanced materials to withstand the demands of performance V-twin engines.
Built for Reliable Engine Performance
- Multi-Layer Steel (MLS) head gaskets for superior sealing integrity
- Steel Viton-coated base gaskets offer enhanced durability and heat resistance
- Blue Viton valve stem seals ensure consistent valve operation
- AFM material components provide reliable sealing under various conditions
- Complete gasket kit means all essential seals are included
The Foundation for a Strong Rebuild
Choosing the right gasket kit is crucial for the longevity and performance of your rebuilt Evo Big Twin. This Cometic EST kit eliminates the need to source individual components, providing a unified solution with materials selected for their sealing properties and durability. It's the foundation for a strong, reliable engine, whether it's powering an Electra Glide or a Tour Glide.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9889
- Length: 22.9 in
- Width: 13.1 in
- Height: 1.8 in
- Weight: 0.05 lbs
Common questions
What's included in this gasket kit?
Every gasket, seal, washer, and O-ring required for a complete engine overhaul — head gaskets, base gaskets, valve stem seals, and more.
Will this fit my Twin Cam or Milwaukee-Eight engine?
No, this kit is specific to Evo Big Twin engines. Twin Cam and M8 engines require different gasket kits. Please verify your engine with our Shop by Bike tool.
Do I need any additional seals or gaskets beyond this kit?
No. The Cometic EST kit is designed as a complete solution, providing all necessary gaskets and seals for a full engine overhaul.
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 | 68-9889 |
| WEIGHT | 0.05 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.36
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?
