Cometic EST Gasket Kit - Harley Evolution Sportster
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 EST Gasket Kit for Evolution Sportster engines is a complete solution for your next engine overhaul. It includes every gasket, seal, washer, and O-ring necessary to rebuild your V-twin with confidence, ensuring reliable compression and leak prevention.
Why riders pick this
- Complete engine gasket and seal kit
- Features Extreme Sealing Technology (EST)
- MLS head gaskets for robust sealing
- Steel Viton-coated base gaskets
- Blue Viton valve stem seals included
- Designed for Harley Evolution Sportster
Engineered with Cometic's Extreme Sealing Technology (EST), this gasket kit provides superior sealing performance for your Harley-Davidson Evolution Sportster. The advanced materials and construction are designed to withstand the demands of V-twin engines, preventing common leaks and maintaining peak performance.
Reliable Sealing for Evo Sportster Engines
- Multi-Layer Steel (MLS) head gaskets for enhanced sealing and durability
- Steel Viton-coated base gaskets offer excellent resistance to heat and chemicals
- Blue Viton valve stem seals provide critical sealing at the valve guides
- AFM material components ensure long-lasting performance
- Complete motor kit includes all gaskets and seals for a total engine overhaul
Rebuild with Extreme Sealing Technology
When undertaking an engine rebuild, the quality of your gaskets is paramount. The Cometic EST Gasket Kit ensures that every sealing surface on your Evolution Sportster is addressed with high-grade components. This technology is crucial for maintaining engine integrity and preventing fluid loss, giving you a dependable and powerful V-twin for miles to come. Trust in Cometic to keep your engine buttoned up tight.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9764
- OE Number: 17026-91a
- Weight: 0.42 lbs
Common questions
What is included in this Cometic gasket kit?
This kit contains every gasket, seal, washer, and O-ring needed for a complete engine overhaul on your Evolution Sportster, from head gaskets to valve stem seals.
What does EST (Extreme Sealing Technology) mean?
EST is Cometic's approach to preventing leaks and maintaining compression in V-Twin engines through the use of advanced materials like MLS head gaskets and Viton-coated seals.
Will this kit fit my specific Evo Sportster year?
This kit is designed for Evolution Sportster models. Please verify fitment using our Shop by Bike tool or by cross-referencing the OE number 17026-91a to ensure compatibility with your motorcycle.
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 | 68-9764 |
| WEIGHT | 0.42 lb |
