✓ VERIFIED
Apr 1, 2024
keeps them lookin shiny
keeps the oil on the right side
COMETIC
SKU: 68-9110-020
Cometic Base Gasket 0.020" 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 rebuilding your V-twin, a precise base gasket is essential for a leak-free engine. This Cometic base gasket, with its 0.020" thickness, is engineered to provide an exact seal at the crankcase base for Twin Cam and Evo Big Twin engines. It meets or exceeds OEM specifications, making it a reliable choice for your 1999-2010 Harley-Davidson.
Why riders pick this
- 0.020" thickness for precise engine sealing
- Fits Twin Cam and Evo Big Twin engines
- Ensures a reliable, leak-free crankcase base
- Manufactured to OEM-replacement specifications
When rebuilding your V-twin, a precise base gasket is essential for a leak-free engine. This Cometic base gasket, with its 0.020" thickness, is engineered to provide an exact seal at the crankcase base for Twin Cam and Evo Big Twin engines. It meets or exceeds OEM specifications, making it a reliable choice for your 1999-2010 Harley-Davidson.
Critical Sealing for Engine Integrity
- 0.020" thickness for accurate engine clearances
- Designed for Twin Cam and Evo Big Twin engines
- Ensures a strong, leak-free crankcase base seal
- Manufactured to OEM-replacement specifications
The Right Gasket for Your Rebuild
Using the correct gasket thickness is paramount for engine performance and longevity. This 0.020" Cometic base gasket is specifically tailored for 1999-2010 Twin Cam and Evo applications. Always use a fresh gasket during any engine work to guarantee optimal compression and prevent oil seepage, giving you peace of mind on every ride.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9110-020
- Thickness: 0.020 in
- Length: 7.3 in
- Width: 6.1 in
- Weight: 0.09 lbs
Common questions
What is the thickness of this Cometic base gasket?
This gasket has a thickness of 0.020 inches, which is a common specification for many Twin Cam and Evo base applications. Always confirm the required thickness for your specific engine.
Will this base gasket fit my Milwaukee-Eight engine?
No, this gasket is specifically designed for 1999-2010 Twin Cam and Evo Big Twin engines only. Milwaukee-Eight engines require different gasket part numbers.
Is it necessary to use a new gasket every time I rebuild my engine?
Yes, gaskets are designed to compress and seal once. Always use a fresh gasket during any engine disassembly or rebuild to ensure a proper, reliable seal and prevent potential 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.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9110-020 |
| WEIGHT | 0.09 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
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✓ VERIFIED
Dec 4, 2023
Easy to install. Good quality and price. Does what it is supposed to do
✓ VERIFIED
Apr 9, 2019
Very good quality/value for the price, I would buy them again.
✓ 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
✓ 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.
✓ VERIFIED
Jun 22, 2014
easy to replace just like oem
