COMETIC SKU: 68-9778

Cometic EST Gasket Kit - Harley Twin Cam Touring

$871.000,00
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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.

For a complete engine overhaul on your Harley Twin Cam Touring model, the Cometic EST Gasket Kit provides all the necessary sealing components. This kit is meticulously assembled to include every gasket, seal, washer, and O-ring, ensuring a comprehensive and leak-free rebuild for your V-twin.

Why riders pick this

  • Complete engine overhaul gasket kit
  • Extreme Sealing Technology (EST) for reliability
  • MLS head gaskets included for optimal sealing
  • Viton-coated base gaskets resist wear and heat
  • Blue Viton valve stem seals for critical areas
  • Designed for Harley Twin Cam Touring engines

Cometic's EST Gasket Kit for Twin Cam Touring engines is engineered with Extreme Sealing Technology to meet the rigorous demands of high-performance Harley-Davidson motorcycles. This kit ensures superior sealing integrity, helping to prevent common leaks and maintain optimal engine compression across thousands of miles.

Engineered for Reliable Touring Performance

  • Multi-Layer Steel (MLS) head gaskets for enhanced durability and sealing performance
  • Steel Viton-coated base gaskets offer excellent resistance to heat and chemicals
  • Blue Viton valve stem seals provide reliable sealing at the valve guides
  • AFM material components contribute to overall gasket longevity
  • Complete overhaul kit with all gaskets, seals, washers, and O-rings for a full rebuild

Confidence for the Long Haul

When you're putting miles on your Touring bike, you need an engine that's sealed tight and performs reliably. This Cometic EST Gasket Kit delivers precisely that, utilizing advanced materials and design to create a robust seal throughout your Twin Cam V-twin. From the cylinders to the cases, every component works together to ensure your rebuilt engine performs reliably and remains free from leaks, letting you focus on the journey ahead.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9778F
  • Weight: 1.92 lbs

Common questions

What components are included in this gasket kit?

This kit provides every gasket, seal, washer, and O-ring needed for a complete engine overhaul on your Twin Cam Touring model, including MLS head gaskets and Viton-coated base gaskets.

What is Cometic's Extreme Sealing Technology (EST)?

EST incorporates advanced materials like MLS head gaskets and Viton-coated seals, designed to offer superior sealing performance and reduce the risk of leaks in high-performance V-Twin engines.

Is this kit compatible with my specific Twin Cam Touring model?

This part is designed for Twin Cam EST engines. For precise fitment, please use our Shop by Bike tool to confirm compatibility with your specific Harley-Davidson Touring model year.

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.
BRANDCometic
TYPEGaskets/Seals
SKU68-9778
WEIGHT1.92 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
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

— John L
✓ VERIFIED
Mar 8, 2026

Gasket

Working fine was for my brother's bike

— CHARLES S
✓ 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.

— Danny D
✓ 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.

— JOHN P
✓ VERIFIED
Jun 6, 2023

A good buy

The gasket fit nicely and no leaks so far . The fitment was spot on .

— John H
✓ VERIFIED
May 4, 2023

There is nothing on them indicating they are actually Cometic gaskets. Are they Substitutes?

— CRAIG B