✓ 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: 68-9151
Cometic Twin Cam Transmission Gasket Kit - Harley Dyna & Softail
$72.32
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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.
The Cometic Twin Cam Transmission Gasket Kit is engineered to provide a reliable seal for your V-twin transmission case. This kit uses high-quality materials to withstand the demands of Twin Cam engines, preventing leaks and maintaining optimal performance. It's a critical component for any transmission service.
Why riders pick this
- Engineered for Twin Cam transmission cases
- OEM-quality design for reliable sealing
- Prevents leaks under demanding conditions
- Complete kit for transmission service
When tackling transmission work on your Twin Cam, a proper seal is non-negotiable. The Cometic Twin Cam Transmission Gasket Kit offers the precision and durability needed to keep your gearset sealed tight. Designed to exacting standards, these gaskets ensure that your transmission fluid stays where it belongs, even under aggressive riding conditions. This kit includes everything you need for a complete transmission reseal, giving you confidence in your build.
Reliable Sealing for Your Drivetrain
- Engineered for Twin Cam transmission cases
- OEM-quality seal design for dependable performance
- Withstands high-stress conditions without leaking
- Essential for transmission rebuilds or maintenance
Maintain Peak Drivetrain Performance
Using the Cometic Twin Cam Transmission Gasket Kit helps ensure your V-twin's drivetrain operates smoothly and efficiently. Whether you're upgrading components or performing routine service, these gaskets provide the foundation for a leak-free transmission. Trust Cometic to deliver the quality and reliability your Harley deserves, keeping your power where it belongs: on the road.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9151
- Weight: 0.38 lbs
Common questions
Is this a complete gasket kit for my Twin Cam transmission?
Yes, this Cometic kit contains the full set of gaskets needed for comprehensive Twin Cam transmission service, ensuring you have all necessary components.
Will this fit my Harley-Davidson Twin Cam model?
This kit is designed for V-twin motorcycles with Twin Cam transmission cases. Please confirm your specific model year and engine type using our 'Shop by Bike' feature before ordering to ensure compatibility.
Are there any special tools required for installation?
While no highly specialized tools are typically required beyond standard shop equipment, a gasket scraper and torque wrench are recommended. Always consult your service manual for precise installation sequences and torque specifications.
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 | 68-9151 |
| WEIGHT | 0.38 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.
