✓ VERIFIED
Jan 16, 2020
Almost identical to OEM. Good fit. I did miss that they are sold as each and not as a pair. Small detail and my fault but it did slow my project down a bit.
COMETIC
SKU: 68-10202
Cometic Milwaukee-Eight Valve Stem Seals 8-Pack - Harley & Indian M8
$82.000,00
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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.
Keep your Milwaukee-Eight engine running clean and strong with these Cometic valve stem seals. This 8-pack provides a complete set of OEM-replacement seals designed to prevent oil from weeping past the valve stems, maintaining proper engine breathing and reducing oil consumption.
Why riders pick this
- OEM-replacement specification for M8 engines
- Prevents oil weeping past valve stems
- Maintains proper engine breathing and reduces oil consumption
- 8-pack provides a full set for Milwaukee-Eight engines
When you're chasing every bit of performance from your Milwaukee-Eight, proper engine sealing is non-negotiable. These Cometic valve stem seals are manufactured to exacting OEM specifications, ensuring a precise fit and reliable performance. They play a critical role in preventing oil from entering the combustion chamber, which can lead to blue smoke and reduced efficiency.
Maintain Peak Engine Performance
- Direct OEM replacement for Milwaukee-Eight valve stem seals
- Prevents oil seepage past valve guides into the combustion chamber
- Helps reduce blue smoke and maintain engine efficiency
- Convenient 8-pack provides a complete set for M8 engines
Essential for Rebuilds and Top-End Work
Whether you're performing a top-end refresh or a full engine rebuild on your M8, new valve stem seals are a critical component. These Cometic seals are designed to withstand the demands of a high-performance V-twin, ensuring long-term reliability. Don't overlook these small but vital parts when you're aiming for optimal engine health.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10202
- OE Part #: 18100044
- Quantity: 8 per pack
- Length: 7 in
- Width: 6 in
- Height: 0.25 in
- Weight: 0.1 lbs
Common questions
Will these valve stem seals fit Twin Cam or older Harley engines?
No, these Cometic valve stem seals are specifically engineered for Milwaukee-Eight (M8) engines. Twin Cam and earlier Harley engines use different seal dimensions.
What is the function of a valve stem seal?
A valve stem seal prevents engine oil from seeping down the valve guide into the combustion chamber, which helps reduce oil burning and maintains proper engine function.
How many valve stem seals are included in this pack?
This product comes with an 8-pack of valve stem seals, providing a complete set for a Milwaukee-Eight engine, which has eight valves total.
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 | 68-10202 |
| WEIGHT | 0.1 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.87
15 RATINGS
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✓ VERIFIED
Oct 18, 2021
Great seals and gaskets do the job once when you use quality gaskets
✓ VERIFIED
Sep 26, 2019
Seal good and I haven't had any issues..
✓ VERIFIED
Jun 27, 2025
It worked like it was suppose to, delivery was quick. <br />Pleased.
✓ VERIFIED
Dec 19, 2023
Just what I needed
Needed these when changing out intake manifold. They worked perfect for my ‘03 sporty.
✓ VERIFIED
Jun 12, 2023
Cometic from here on out
These seals are the only ones I'll use. others came close but, for me, these are best.
