✓ 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: 68-10304F1
Cometic Primary Housing Gasket - Harley Milwaukee-Eight Softail
$8.12
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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.
Maintain a leak-free primary drive on your Harley Milwaukee-Eight Softail with the Cometic Primary Housing Gasket. This single-pack replacement gasket is engineered to seal the primary cover against the crankcase, preventing fluid leaks and ensuring proper function. Built with Cometic's renowned quality, it meets the exacting standards of OEM specification 25701080.
Why riders pick this
- Direct replacement for Harley Milwaukee-Eight Softail primary
- Meets OEM specification 25701080 for guaranteed fit
- Ensures a reliable, leak-free primary housing seal
- Engineered with Cometic quality for V-twin engines
- Essential for routine maintenance and repairs
A reliable primary housing gasket is critical for the long-term health of your Milwaukee-Eight Softail's primary drive system. Over time, original gaskets can degrade, leading to unsightly leaks and potential damage. This Cometic gasket provides a fresh, durable seal, giving you peace of mind whether you're performing routine maintenance or addressing an existing leak. Trust in Cometic's expertise for V-twin engine components.
Precision Sealing for Your M8
- Engineered specifically for Harley Milwaukee-Eight Softail primary housings
- Meets or exceeds OEM specification 25701080 for a perfect fit
- Provides a durable, leak-free seal between the primary cover and crankcase
- High-quality material designed to withstand V-twin operating conditions
Essential for Maintenance
Whether you're doing a routine primary fluid change, inspecting your clutch, or replacing other primary components, installing a new Cometic primary housing gasket is a crucial step. This single gasket ensures a fresh, tight seal every time, preventing potential issues down the road. It's an indispensable part for any Milwaukee-Eight Softail owner committed to proper maintenance and reliability.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10304F1
- OEM Part #: 25701080
- Quantity: 1 per pack
- Length: 7 in
- Width: 6 in
- Height: 0.05 in
- Weight: 0.25 lbs
Common questions
Will this gasket fit all Milwaukee-Eight Softail models?
Yes, this Cometic primary housing gasket is designed to fit all Harley-Davidson Milwaukee-Eight Softail models. Please confirm your motorcycle has an M8 engine before ordering.
Is this a single gasket or does it come in a set?
This product is a single primary housing gasket. If you require multiple gaskets for future maintenance or spares, you will need to order additional quantities.
How do I know if I need to replace my primary housing gasket?
Signs that you may need a new primary housing gasket include visible fluid leaks around the primary cover seam, or if you are performing any maintenance that requires removing the primary cover, as gaskets are typically single-use items.
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 | 68-10304F1 |
| WEIGHT | 0.25 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★
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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.
