✓ 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: 68-9751F
Cometic Evo Big Twin EST Gasket Kit - Harley Evolution Top-End
$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.
When tackling a top-end overhaul on your Evo Big Twin, having the right gasket kit is crucial for a successful rebuild. This Cometic Evo Big Twin EST Gasket Kit supplies every gasket, seal, washer, and O-ring needed to refresh your engine's top end. It's designed to deliver modern V-twin performance and reliable sealing.
Why riders pick this
- Complete top-end overhaul kit for Evo Big Twin
- MLS head gaskets included for robust sealing
- Steel Viton-coated base gaskets
- Blue Viton valve stem seals for oil control
- All gaskets, seals, and O-rings for top end
This Cometic Evo Big Twin EST Gasket Kit provides a comprehensive solution for a complete top-end overhaul on Harley-Davidson Evolution Big Twin engines. It includes high-quality Multi-Layer Steel (MLS) head gaskets, steel Viton-coated base gaskets, and durable blue Viton valve stem seals. These components are engineered to withstand the demands of V-twin engines, ensuring a tight seal and optimal performance after your rebuild.
Advanced Materials for Enhanced Reliability
- MLS head gaskets offer superior sealing and longevity for high-performance applications
- Steel Viton-coated base gaskets provide excellent resistance to heat and fluids
- Blue Viton valve stem seals ensure precise oil control and reduce emissions
- Complete kit includes all necessary gaskets, seals, washers, and O-rings for a full top-end rebuild
- AFM material construction for dependable sealing on all critical surfaces
Essential for Evo Top-End Rebuilds
A top-end rebuild is a significant undertaking, and using a high-quality gasket kit like this Cometic offering is key to its success. This kit eliminates the guesswork of sourcing individual seals, allowing you to focus on the rebuild itself. Ensure your Evo Big Twin runs strong and leak-free by choosing components engineered for performance and durability.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9751F
- Weight: 3.1 lbs
Common questions
What does 'top-end overhaul' mean for this kit?
This kit includes all the gaskets, seals, washers, and O-rings required for rebuilding the cylinder heads and cylinders, often referred to as the top end, of your Evo Big Twin engine.
Is this gasket kit compatible with Twin Cam or Milwaukee-Eight engines?
No, this Cometic Evo Big Twin EST Gasket Kit is specifically engineered for Harley-Davidson Evolution Big Twin engines. Twin Cam and Milwaukee-Eight models require different gasket sets.
Are the head gaskets included in this kit?
Yes, Multi-Layer Steel (MLS) head gaskets are a key component of this complete top-end overhaul kit for your Evo Big Twin.
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 | 68-9751F |
| WEIGHT | 3.1 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
