COMETIC SKU: 68-9110-010

Cometic Base Gasket 0.010" Twin Cam & Evo Big Twin - Harley Twin Cam & Evo

$31.55
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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.

When you're tearing down an Evo Big Twin or Twin Cam motor, don't skimp on the base gaskets. This Cometic base gasket is engineered with modern materials to ensure a precise, leak-free seal at the engine case, meeting OEM specifications for a reliable rebuild. At 0.010" thick, it's designed to maintain proper clearances and prevent oil leaks.

Why riders pick this

  • Fits Evo Big Twin and Twin Cam engines
  • Provides a reliable seal at the engine case base
  • 0.010" thickness for precise fitment
  • Built with modern, high-quality gasket materials

When you're tearing down an Evo Big Twin or Twin Cam motor, don't skimp on the base gaskets. This Cometic base gasket is engineered with modern materials to ensure a precise, leak-free seal at the engine case, meeting OEM specifications for a reliable rebuild. At 0.010" thick, it's designed to maintain proper clearances and prevent oil leaks.

Precision Sealing for V-Twin Engines

  • Engineered for Evo Big Twin and Twin Cam engines
  • Provides a critical seal at the engine case base
  • Constructed with modern, durable gasket materials
  • Maintains precise engine clearances with 0.010" thickness

Essential for Engine Rebuilds

A fresh base gasket is essential for any engine disassembly or rebuild. Cometic's commitment to quality means this gasket will stand up to the demands of your Harley-Davidson. Ensure you verify the required thickness for your specific engine application to achieve the best possible seal and prevent future issues.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9110-010
  • Thickness: 0.010"
  • Length: 7.3 in
  • Width: 6.1 in
  • Weight: 0.06 lbs

Common questions

What engine models does this Cometic base gasket fit?

This gasket is designed for Evo Big Twin and Twin Cam engines, specifically for Harley-Davidson models from 1999 to 2010.

What is the thickness of this base gasket?

This gasket has a thickness of 0.010 inches. It's important to confirm this thickness matches your engine's requirements before placing an order.

Should I replace the base gasket during an engine rebuild?

Yes, Cometic strongly recommends replacing the base gasket whenever the engine case is disassembled. This ensures a proper, leak-free seal and prevents potential oil leaks.

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
SKU68-9110-010
WEIGHT0.06 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.71
14 RATINGS
5★ 11
4★ 2
3★ 1
2★ 0
1★ 0
✓ VERIFIED
Apr 1, 2024

keeps them lookin shiny

keeps the oil on the right side

— Frank N
✓ VERIFIED
Dec 4, 2023

Easy to install. Good quality and price. Does what it is supposed to do

— Brendan S
✓ VERIFIED
Apr 9, 2019

Very good quality/value for the price, I would buy them again.

— Anonymous
✓ VERIFIED
May 1, 2016

Good gasket, I like these because they are the same thickness as factory, and do not change the end play on the cam and breather

— Anonymous
✓ VERIFIED
Apr 29, 2015

Decent gasket. Sticks out of the nosecone cover a bit at the top as it doesn't follow the nose cone shape precisely. Seals well.

— Anonymous
✓ VERIFIED
Jun 22, 2014

easy to replace just like oem

— Anonymous