COMETIC SKU: 68-9789

Cometic Twin Cam EST Complete Gasket Kit - Harley & Indian Twin Cam

$147.43
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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.

This Cometic Twin Cam EST gasket kit is the comprehensive solution for any full engine overhaul on your Twin Cam V-twin. It provides every gasket, seal, washer, and O-ring required to fully reseal your engine. Featuring MLS head gaskets and steel Viton-coated base gaskets, this kit ensures robust and reliable sealing.

Why riders pick this

  • Complete engine overhaul gasket kit
  • MLS head gaskets for enhanced sealing
  • Steel Viton-coated base gaskets for durability
  • Blue Viton valve stem seals included
  • AFM material components for full engine seal

When undertaking a complete engine overhaul on your Harley-Davidson or Indian Motorcycle Twin Cam, this Cometic EST gasket kit provides peace of mind. Every component needed for a thorough reseal is included, from critical MLS head gaskets to blue Viton valve stem seals. This kit is designed to eliminate the guesswork and ensure you have all the necessary parts for a professional, leak-free rebuild, promoting optimal engine performance and longevity.

Advanced Sealing Technology

  • MLS (Multi-Layer Steel) head gaskets for superior sealing under high pressure
  • Steel Viton-coated base gaskets enhance durability and resistance to fluids
  • Blue Viton valve stem seals ensure consistent valve train performance
  • AFM material components provide comprehensive sealing for all engine surfaces

Streamlined Engine Rebuilding

This complete gasket kit simplifies the engine rebuilding process by bundling all essential sealing components into one package. No more hunting for individual parts – you get everything required for a full engine overhaul. Designed for Twin Cam EST engines, it’s crucial to confirm compatibility with your specific V-twin model to ensure a perfect fit for your next project, whether it's routine maintenance or a performance build.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9789
  • Length: 9 in
  • Width: 7.5 in
  • Height: 2.1 in
  • Weight: 0.8 lbs

Common questions

What components are included in this Cometic gasket kit?

This kit includes every gasket, seal, washer, and O-ring necessary for a complete Twin Cam engine overhaul, such as MLS head gaskets, Viton-coated base gaskets, and blue Viton valve stem seals.

Will this kit fit my Harley-Davidson or Indian Motorcycle Twin Cam engine?

This kit is designed for Twin Cam EST engines found in both Harley-Davidson and Indian Motorcycle models. Please confirm your engine type and model year using our Shop by Bike feature for precise fitment.

What materials are used in the main gaskets?

The kit features MLS (multi-layer steel) head gaskets and steel Viton-coated base gaskets, known for their durability and superior sealing properties.

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
SKU68-9789
WEIGHT0.8 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