✓ VERIFIED
May 11, 2025
Worked great just what I was looking for
JAMES GASKETS
SKU: 681-6107
James Gaskets Milwaukee-Eight Coolant Manifold O-Ring 25-Pack - Harley M8 Liquid-Cooled
$14.50
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About James Gaskets
James Gaskets has supplied American V-twin gaskets, seals and O-rings for decades and is one of the most widely stocked names for Harley-Davidson engine, primary and transmission rebuilds. When a service manual calls for a specific gasket, James almost always has an exact-fit answer.
This 25-pack of James Gaskets Milwaukee-Eight coolant manifold O-rings is essential for shops and riders who frequently service liquid-cooled M8 engines. Each O-ring is manufactured to direct OEM replacement specifications, ensuring a perfect seal in the coolant manifold junction. Prevent leaks and keep your Milwaukee-Eight running cool.
Why riders pick this
- 25-pack for shops and multi-bike owners
- Specific to Milwaukee-Eight liquid-cooled engines
- Direct OEM replacement for reliable sealing
- Prevents coolant leakage from the manifold junction
- Ensures optimal performance of your M8 cooling system
Maintaining your liquid-cooled Milwaukee-Eight means having the right seals on hand. This convenient 25-pack of coolant manifold O-rings from James Gaskets ensures you're ready for any service or repair. Designed to prevent coolant leakage, these O-rings are critical for the long-term health of your M8's cooling system. They are manufactured to precise OEM standards for a reliable fit and performance.
Bulk Pack for Consistent Maintenance
- 25-pack quantity ideal for service shops and frequent maintenance
- Direct OEM replacement specification for liquid-cooled M8 engines
- Ensures proper sealing in the coolant manifold junction
- Helps prevent leaks and maintain cooling system integrity
Critical Seals for Liquid-Cooled M8s
The liquid-cooled Milwaukee-Eight engine demands specific components for its advanced cooling system. These O-rings are specifically engineered for that application, unlike seals for air-cooled or older V-twin platforms. Having a bulk pack means you always have fresh seals for routine maintenance or unexpected repairs. Always confirm the correct placement of these O-rings within the coolant manifold during installation to ensure a secure, leak-free connection.
Specifications
- Brand: James Gaskets
- Manufacturer Part #: 11900090
- Quantity: 25 per pack
- Weight: 0.02 lbs
Common questions
Will these O-rings fit Twin Cam or Evolution engines?
No, these James Gaskets O-rings are specifically designed for Milwaukee-Eight liquid-cooled engines only. Twin Cam and Evolution engines require different seals.
Why are these O-rings sold in a 25-pack?
The 25-pack quantity is intended for professional service shops, fleet maintenance, and riders who maintain multiple M8-equipped bikes, ensuring a ready supply of replacement seals.
Are these O-rings equivalent to the OEM Harley part?
Yes, James Gaskets manufactures these coolant manifold O-rings to OEM specifications, making them a direct replacement for your Harley-Davidson Milwaukee-Eight.
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 | James Gaskets |
| TYPE | Gaskets/Seals |
| SKU | 681-6107 |
| WEIGHT | 0.02 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.92
13 RATINGS
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✓ VERIFIED
Sep 30, 2024
Great company
Awesome part for a great price
✓ VERIFIED
Dec 30, 2022
Perfect fit, functions as expected. Great quality, highly recommend, would purchase again.
✓ VERIFIED
Apr 18, 2026
Excellent
✓ VERIFIED
Feb 12, 2026
Perfect fit and resonably priced
Since this aprt cannot be ordered from Harley's website (like many of their parts) it's a convenient and perfct fit.
✓ VERIFIED
Oct 5, 2025
good quality, works perfect
as described, works perfectly this thing says 2006 to 2017. it actually works 2006 to 2025 touring bike bikes.
