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Start ShoppingCometic C9644F Twin Cam Transmission Gasket - MLS Steel with Silicone Beading for Harley-Davidson
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Description
Upgrade your Harley-Davidson Twin Cam transmission with this high-performance gasket engineered for durability and leak prevention. Cometic's MLS design ensures a perfect seal for long-lasting engine reliability.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides superior sealing strength and resistance to oil leaks under high pressure.
- Integrated Silicone Beading: Enhances sealing integrity and prevents fluid seepage around critical engine components.
- 0.015" Thickness: Optimized compression for secure fit without over-stressing engine housing.
- Harley-Davidson Twin Cam Compatibility: Precision-engineered for seamless installation on specified transmission housings.
Why Choose This Product
Cometic's transmission gaskets are trusted by mechanics and riders alike for their ability to withstand extreme temperatures and pressures. The combination of MLS steel and silicone beading creates a durable, long-lasting seal that reduces maintenance needs and prevents costly engine damage. This gasket's precise fit for Harley-Davidson Twin Cam applications ensures easy installation and optimal performance, making it an essential upgrade for riders seeking reliable powerplant operation.
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Upgrade your Harley-Davidson Twin Cam transmission with this high-performance gasket engineered for durability and leak prevention. Cometic's MLS design ensures a perfect seal for long-lasting engine reliability.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides superior sealing strength and resistance to oil leaks under high pressure.
- Integrated Silicone Beading: Enhances sealing integrity and prevents fluid seepage around critical engine components.
- 0.015" Thickness: Optimized compression for secure fit without over-stressing engine housing.
- Harley-Davidson Twin Cam Compatibility: Precision-engineered for seamless installation on specified transmission housings.
Why Choose This Product
Cometic's transmission gaskets are trusted by mechanics and riders alike for their ability to withstand extreme temperatures and pressures. The combination of MLS steel and silicone beading creates a durable, long-lasting seal that reduces maintenance needs and prevents costly engine damage. This gasket's precise fit for Harley-Davidson Twin Cam applications ensures easy installation and optimal performance, making it an essential upgrade for riders seeking reliable powerplant operation.
| SKU | GM1BF85118 |
|---|---|
| MPN | C9644F |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Twin Cam Big Twin (except 2007-17 Touring models) | 1999-2006 |
Frequently Asked Questions
No, C9644F fits 1999-2006 Twin Cam Big Twin models only. Check C9645 for later models.
MLS gaskets like this can often be reused if undamaged, but replacement is recommended during transmission work.
Multi-layer steel is more durable, resists blowouts, and handles higher torque/heat better than stock paper.
Yes, recommended to replace O-ring (Harley PN 11105-96) for best seal.
Installation Guide
Difficulty
Easy
Est. Time
20 min
Tools Required
- socket set (3/8" drive)
- torque wrench
- gasket scraper
- Harley transmission cover bolts
Pro Tips
- Clean surfaces with brake cleaner and plastic scraper. Torque bolts to 108-144 in-lbs in crisscross pattern. Apply thin layer of RTV at corners if needed.
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Over-torquing bolts which can crack cover
Comparison vs Stock/OEM
Replaces Harley paper gasket (PN 35066-99); MLS construction vs. compressible paper
Improvements
- Superior sealing under high pressure
- Resists heat and torque better
- Longer service life
Considerations
- Slightly thicker (0.015") may require checking clearances
Durability & Warranty
Expected Lifespan
Indefinite with proper torque; outlasts paper 3-5x
Warranty
Cometic 1-year warranty against defects
Maintenance
Inspect during transmission service; reusable if flat and undamaged
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