✓ VERIFIED
Jan 20, 2021
5 stars! fit perfect! snug enough to hold its self in place while installing exhaust, but not so tight as to cause gasket damage when inserting into place.
COMETIC
SKU: 68-9130
Cometic Evo Big Twin EST Complete Motor Gasket Kit - Harley Evolution Big Twin
$107.72
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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.
For a complete engine overhaul on your Evo Big Twin, the Cometic Evo Big Twin EST Gasket Kit delivers everything you need. This comprehensive kit provides every seal, washer, and O-ring to ensure a reliable and leak-free rebuild. Engineered with Extreme Sealing Technology, it's built to perform.
Why riders pick this
- Complete engine overhaul kit for Evo Big Twin
- Features Extreme Sealing Technology (EST)
- Includes MLS head gaskets for enhanced sealing
- Viton-coated base gaskets and valve stem seals
- All gaskets, seals, washers, and O-rings included
The Cometic Evo Big Twin EST Gasket Kit is designed for a full engine overhaul on Evolution Big Twin V-twin motorcycles. This kit features Cometic's Extreme Sealing Technology (EST), which incorporates advanced materials for superior sealing and durability. From MLS head gaskets to blue Viton valve stem seals, every component in this kit is chosen for its ability to withstand the demands of a high-performance V-twin engine.
Extreme Sealing for Your Big Twin
- MLS (Multi-Layer Steel) head gaskets for robust cylinder sealing
- Steel Viton-coated base gaskets resist high temperatures and chemicals
- Blue Viton valve stem seals ensure consistent oil control
- AFM material components provide excellent sealing properties
- Complete kit includes all gaskets, seals, washers, and O-rings for an overhaul
Precision Engineering for Longevity
Rebuilding a Big Twin requires attention to detail and reliable parts. This Cometic EST gasket kit provides the foundation for a long-lasting engine. By supplying all necessary sealing components in one package, it simplifies the overhaul process and ensures that every critical junction is sealed with quality. Trust Cometic to help you get your Big Twin back on the road with confidence.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9130
- Weight: 1.136 lbs
Common questions
What components are included in this complete gasket kit?
This kit includes every gasket, seal, washer, and O-ring needed for a complete engine overhaul on Evo Big Twin V-twin engines, such as MLS head gaskets, steel Viton-coated base gaskets, and blue Viton valve stem seals.
Is this kit compatible with all Harley-Davidson Evolution Big Twin models?
This kit is specifically designed for Evo Big Twin engines. For precise compatibility, please refer to our Shop by Bike tool to confirm fitment for your specific Harley-Davidson model year.
Do I need to purchase additional gaskets separately with this kit?
No, this is a complete overhaul kit. It includes all the gaskets and seals required for a full engine rebuild, eliminating the need to source individual components.
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 | 68-9130 |
| WEIGHT | 1.14 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.84
61 RATINGS
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✓ VERIFIED
Mar 25, 2022
I was shiped only one gasket. didnt i need 2?
✓ VERIFIED
Nov 3, 2021
Perfect fit, excellent choice for replacing the OE PART
✓ VERIFIED
May 19, 2026
Exactly what I was looking for
Perfect fit and great price
✓ VERIFIED
Apr 5, 2026
Im going to order more stuff!!!
The donut was exactly as pictured online.The item was delivered faster than anything I've received that I can remember, except maybe Starbucks.Thats how fast it hit my doorstep.No problems whatsoever.
✓ VERIFIED
Feb 11, 2026
Won’t buy anything else
Good product only one that doesn’t get blown out
