✓ 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: 68-9749F
Cometic Evo Big Twin EST Gasket Kit - Harley Evolution Big Twin
$353.55
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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.
Performing a full engine overhaul on your Evo Big Twin demands a comprehensive gasket solution. This Cometic Evo Big Twin EST Gasket Kit provides every gasket, seal, washer, and O-ring required to rebuild your V-twin engine to factory specifications. It's the ideal choice for ensuring a leak-free and reliable engine after a rebuild.
Why riders pick this
- Complete engine overhaul kit for Evo Big Twin
- MLS head gaskets for superior compression
- Viton-coated base gaskets resist leaks
- Blue Viton valve stem seals included
- All necessary gaskets, seals, and O-rings
This Cometic Evo Big Twin EST Gasket Kit is engineered for a complete engine overhaul on Harley-Davidson Evolution Big Twin engines. It features Multi-Layer Steel (MLS) head gaskets, steel Viton-coated base gaskets, and blue Viton valve stem seals, all designed to provide superior sealing and durability. This kit ensures that every critical sealing point on your V-twin is addressed with high-quality components for long-lasting performance.
Precision Sealing for Your Evo
- MLS head gaskets deliver robust sealing under high combustion pressures
- Steel Viton-coated base gaskets offer enhanced resistance to chemicals and heat
- Blue Viton valve stem seals help maintain consistent oil control in the cylinder heads
- AFM material components provide reliable sealing for various engine interfaces
- Complete kit includes all gaskets, seals, washers, and O-rings for a total rebuild
Reliable Rebuilds for Harley V-Twins
Whether you're bringing an older Evo Big Twin back to life or addressing a specific engine issue, this Cometic gasket kit offers a dependable foundation. The inclusion of high-quality materials ensures that your engine remains sealed tight, preventing common issues associated with worn-out gaskets. Trust Cometic for a professional-grade rebuild that stands up to the demands of the road.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9749F
- Weight: 1.74 lbs
- Kit Type: Evo Big Twin EST
Common questions
What specific engines does this kit fit?
This Cometic Evo Big Twin EST Gasket Kit is specifically engineered for Harley-Davidson Evolution Big Twin engines.
Do I need to purchase additional seals for a complete overhaul?
No, this kit is a complete overhaul solution that includes every gasket, seal, washer, and O-ring needed for an Evo Big Twin engine rebuild.
What are the benefits of MLS head gaskets?
Multi-Layer Steel (MLS) head gaskets provide improved sealing capabilities and enhanced durability, especially under the high combustion pressures found in performance V-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 | 68-9749F |
| WEIGHT | 1.74 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
