✓ 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: 68-997630
Cometic Twin Cam EST Complete Gasket Kit - Harley Twin Cam
$147.46
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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, a complete gasket kit is non-negotiable. This Cometic Twin Cam EST Gasket Kit provides every seal, washer, and O-ring you need for a thorough rebuild. It's engineered with modern V-twin performance in mind, ensuring a durable, leak-free seal.
Why riders pick this
- Complete kit for full engine overhaul
- MLS head gaskets for enhanced sealing
- Viton-coated base gaskets resist chemicals and heat
- Blue Viton valve stem seals for modern V-twin engines
- AFM material components for long-term reliability
This Cometic Twin Cam EST gasket kit includes every gasket, seal, washer, and O-ring necessary for a complete engine overhaul. Designed for Harley-Davidson Twin Cam EST engines, this kit ensures you have all the right components to maintain peak performance and prevent leaks after a rebuild.
Advanced Sealing Technology
- MLS head gaskets provide superior sealing under high temperatures and pressures
- Steel Viton-coated base gaskets offer enhanced durability and chemical resistance
- Blue Viton valve stem seals are engineered for modern V-twin operating conditions
- AFM material components ensure a reliable and long-lasting seal
Built for Performance and Reliability
Whether you're doing routine maintenance or a full performance build, having a high-quality gasket kit is crucial. Cometic's commitment to advanced materials means these gaskets can handle the demands of a hopped-up Twin Cam. This kit helps ensure your engine performs as it should, without drips or loss of compression. Confirm fitment with your specific year and model before ordering.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9976-030
- Weight: 0.8733 lbs
Common questions
What is included in this Cometic gasket kit?
This kit includes every gasket, seal, washer, and O-ring needed for a complete engine overhaul, such as MLS head gaskets, steel Viton-coated base gaskets, and blue Viton valve stem seals.
Will this gasket kit fit my Harley-Davidson Twin Cam engine?
This kit is specifically designed for Harley-Davidson Twin Cam EST engines. Please use our Shop by Bike feature to confirm compatibility with your exact year and model.
What are the key material technologies used in these gaskets?
Cometic utilizes Multi-Layer Steel (MLS) for head gaskets, steel Viton-coated for base gaskets, and blue Viton for valve stem seals, along with AFM material components for robust performance.
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 | 68-997630 |
| WEIGHT | 0.87 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
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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?
