✓ 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: 68-9635
Cometic Evo Big Twin EST Gasket Kit - Harley Evolution Big Twin
$436.000,00
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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 rebuild on your Harley Evolution Big Twin, the Cometic EST Gasket Kit delivers the comprehensive sealing solution you need. This kit provides all the necessary components for a complete engine overhaul, ensuring every critical junction is sealed tight.
Why riders pick this
- Complete kit for Evo Big Twin engine overhauls
- Multi-Layer Steel (MLS) head gaskets included
- Steel Viton-coated base gaskets for durability
- Blue Viton valve stem seals for oil control
- AFM material components ensure OEM-level reliability
This Cometic Evo Big Twin EST Gasket Kit is specifically engineered for Harley-Davidson Evolution Big Twin engines. It includes every gasket, seal, washer, and O-ring required for a thorough engine overhaul, bringing confidence to your next build. Designed with advanced materials, this kit helps maintain the integrity and performance of your V-twin powerplant.
Advanced Sealing for Critical Engine Components
- Complete kit for a full Evolution Big Twin engine overhaul
- Multi-Layer Steel (MLS) head gaskets for superior sealing
- Steel Viton-coated base gaskets for enhanced durability
- Blue Viton valve stem seals for reliable oil control
- AFM material components ensure OEM-level reliability
Rebuild with Confidence
Whether you're refreshing a high-mileage engine or building a performance monster, reliable gaskets are non-negotiable. This Cometic kit is designed to meet the demands of both stock and modified Evolution Big Twin engines, providing a robust seal against leaks and maintaining optimal compression. Always confirm fitment for your specific model before starting any major engine work.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9635
- UPC: 191070012960
- Length: 7.9 in
- Width: 9.5 in
- Height: 2.5 in
- Weight: 0.81 lbs
Common questions
What engine platform does this gasket kit fit?
This Cometic EST Gasket Kit is designed specifically for Harley-Davidson Evolution Big Twin engines. It will not fit Twin Cam or Milwaukee-Eight engines.
What components are included in this kit?
This kit includes all gaskets, seals, washers, and O-rings necessary for a complete engine overhaul, such as MLS head gaskets, steel Viton-coated base gaskets, blue Viton valve stem seals, and AFM material components.
Are these gaskets suitable for high-performance builds?
Cometic gaskets are engineered with advanced materials like MLS and Viton-coated steel, making them a strong choice for both stock and performance-oriented Evolution Big Twin engine builds. Always ensure proper surface prep and torque specifications during installation.
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 | 68-9635 |
| WEIGHT | 0.81 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?
