✓ 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: 68-10215
Cometic Transmission Gasket .032" - Harley Milwaukee-Eight
$21.09
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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.
Achieve a precise and reliable seal for your Milwaukee-Eight transmission with this Cometic gasket. Engineered as an OEM replacement with a .032" thickness, this single gasket unit is designed to prevent leaks and maintain the integrity of your V-twin's drivetrain. It's a critical component for any transmission service or rebuild.
Why riders pick this
- OEM-equivalent replacement for M8 transmissions
- Precision .032" thickness for optimal sealing
- Ensures a leak-free transmission case
- Essential for transmission service and rebuilds
When servicing the transmission on your Milwaukee-Eight, the gasket plays a crucial role in preventing fluid leaks and ensuring proper operation. This Cometic transmission gasket is manufactured to OEM specifications with a precise .032" thickness, providing the correct crush and sealing properties. It's an essential item for anyone performing clutch work, gear swaps, or any maintenance that requires opening the transmission case.
Precision Seal for Your M8 Transmission
- OEM-equivalent replacement for Milwaukee-Eight transmissions
- Precisely manufactured with a .032" thickness
- Ensures a leak-free seal for the transmission case
- Single gasket unit for one-time installation
Maintaining Your Drivetrain's Integrity
The transmission on a Harley-Davidson V-twin endures significant stress, and a robust seal is vital for its longevity. Using the correct gasket, like this Cometic .032" unit, helps maintain proper internal pressures and keeps contaminants out. Always opt for a new gasket when reassembling your transmission to avoid potential leaks and ensure your M8 continues to shift smoothly and reliably.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10215
- OEM Part #: 25700452
- Thickness: 0.032"
- Weight: 0.2 lbs
- Quantity: 1 per pack
Common questions
Is this a genuine Cometic gasket?
Yes, this is a genuine Cometic-manufactured OEM replacement gasket, built to factory specifications for your Milwaukee-Eight transmission.
Will this fit my Twin Cam transmission?
No, this gasket is specifically designed for Milwaukee-Eight (M8) transmissions. Twin Cam motorcycles require a different part number.
Why does gasket thickness matter?
Gasket thickness is critical for proper sealing performance and achieving the correct bolt-down pressure. Using the specified thickness, like this .032" Cometic gasket, is essential for a reliable seal.
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 | 68-10215 |
| WEIGHT | 0.2 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.
