✓ 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: 68-10201
Cometic Milwaukee 8 Coolant Manifold O-Ring - M8 10pk Oe#11900090 — Harley-Davidson (2017-2019)
$19.83
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Cometic Milwaukee 8 coolant manifold O-ring, a 10-pack of OEM-specification seals for Harley-Davidson M8 engines. Direct replacement for Harley part #11900090.
Features
- 10-pack quantity
- OEM-specification material
- Milwaukee-Eight (M8) coolant manifold application
Specifications
- Brand: Cometic
- Manufacturer Part #: C10201
- OEM Part #: 11900090
- Quantity: 10 per pack
- Length: 7 in
- Width: 6 in
- Height: 0.25 in
- Weight: 0.1 lbs
Fitment
Fits Harley-Davidson Milwaukee-Eight (M8) engines requiring coolant manifold seal replacement.
Frequently Asked Questions
Is this the OEM Harley part?
This is the equivalent O-ring to Harley part #11900090. Cometic manufactures to OEM specifications.
How many O-rings are in a pack?
10 O-rings per pack — useful for shops, multi-bike fleets, or keeping spares on hand.
Will this fit my Twin Cam or TC-88 engine?
No — this O-ring is specific to Milwaukee-Eight (M8) engines. Twin Cam bikes use different coolant manifold seals.
What's the application for this O-ring?
Seals the coolant manifold on M8 engines. Replacement is recommended when servicing cooling system components.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-10201 |
| 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
5★
13
4★
2
3★
0
2★
0
1★
0
✓ 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.
