✓ 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: 68-9164
Cometic EST Complete Gasket Kit - Harley 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.
This Cometic EST gasket kit provides every gasket, seal, washer, and O-ring required for a full engine overhaul on your Evolution Big Twin V-twin. Engineered for robust sealing, this kit ensures your rebuild stands up to the demands of the road. It's the comprehensive solution for riders aiming for a leak-free, high-performance engine.
Why riders pick this
- Complete kit for full Evolution Big Twin engine overhaul
- Multi-Layer Steel (MLS) head gaskets for durable sealing
- Steel Viton-coated base gaskets resist heat and chemicals
- Blue Viton valve stem seals prevent oil leaks
- AFM material ensures consistent sealing across temperatures
When you're tearing down an Evolution Big Twin for a rebuild, the last thing you want is to chase down individual gaskets and seals. This Cometic EST gasket kit simplifies the process, providing a complete set of components specifically designed for your Evo motor. From the top end to the bottom, you'll have everything needed to ensure a tight, reliable seal on your powerplant, letting you get back on the road with confidence.
Advanced Sealing Technology
- Includes Multi-Layer Steel (MLS) head gaskets for superior sealing under extreme conditions
- Features steel Viton-coated base gaskets for enhanced durability and resistance to chemicals
- Equipped with blue Viton valve stem seals to prevent oil seepage at the guides
- Utilizes AFM material components for reliable sealing across a wide range of engine temperatures
- A complete kit with all necessary gaskets, seals, washers, and O-rings for a full engine overhaul
Rebuild with Confidence
A proper engine rebuild starts with quality gaskets, and Cometic delivers with this EST kit. Designed for the specific needs of Evolution Big Twin engines, these components meet the demands of performance riders. Whether you're refreshing a high-mileage motor or buttoning up a performance build, this kit provides peace of mind that your engine will be sealed correctly, helping to maintain optimal compression and oil control.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9164
- Weight: 1.71 lbs
- Engine Type: Evo Big Twin
Common questions
What engine platforms does this gasket kit fit?
This Cometic EST gasket kit is specifically designed for Evolution Big Twin V-twin engines found in various Harley-Davidson models.
Does this kit include everything for an engine rebuild?
Yes, this comprehensive kit supplies every gasket, seal, washer, and O-ring required for a complete engine overhaul, from top to bottom.
Are these gaskets designed for performance applications?
Cometic gaskets are engineered with advanced materials like MLS and Viton-coated steel to provide robust and reliable sealing, suitable for both stock and performance-tuned Evolution Big 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 | 68-9164 |
| 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?
