✓ VERIFIED
Apr 1, 2024
keeps them lookin shiny
keeps the oil on the right side
COMETIC
SKU: 68-9166
Cometic Evo Big Twin/Twin Cam Valve Stem Seal - OIL Seals Twin CAM 10/PK Oe#180… — Harley-Davidson (1999-2017)
$40.18
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Cometic valve stem seal for Evo Big Twin and Twin Cam V-twin engines, sold in a 10-pack. Direct replacement for stock seals to prevent oil seepage at the valve stem.
Features
- 10-pack quantity
- OEM replacement specification
- For Evo Big Twin and Twin Cam engines
Specifications
- Brand: Cometic
- Manufacturer Part #: C9166
- Weight: 0.15 lbs
- Quantity: 10 per pack
Fitment
Fits Harley-Davidson Evo Big Twin and Twin Cam V-twin engines. Verify your engine type before ordering.
Frequently Asked Questions
How many seals are in a pack?
10 valve stem seals per pack — enough for one engine rebuild with spares or multiple service intervals.
Will these fit my Evo engine?
Yes — this part fits Harley Evo Big Twin engines. Twin Cam engines also use this seal.
Why would I need new valve stem seals?
Seals harden and crack over time, causing oil to seep down the valve guides into the combustion chamber. New seals stop this leak during a rebuild or top-end service.
Is installation difficult?
Valve stem seal replacement requires cylinder head removal and valve train disassembly. Most riders have a shop perform this work.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9166 |
| WEIGHT | 0.15 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
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
