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Start ShoppingCOMETIC C9607F5 MLS Primary Gasket for Panhead/Shovelhead/Evo Big Twin - High-Performance Sealing Solution
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Description
Ensure flawless engine performance with COMETIC's premium primary gasket designed for Panhead, Shovelhead, and Evo Big Twin models. This high-performance solution combines multi-layer steel (MLS) durability with silicone beading for maximum sealing reliability.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides exceptional heat resistance and sealing integrity for demanding engine environments.
- 0.015in Thickness: Optimized single-layer design for precise fitment and easy installation on Big Twin primary drive covers.
- Silicone Beading: Enhances sealing performance and prevents fluid leaks under high-pressure conditions.
- Universal Fit: Compatible with all primary drive covers on Panhead, Shovelhead, and Evo Big Twin engines.
Why Choose This Product
Upgrade your engine's reliability with a gasket engineered for long-term durability and leak-proof performance. The MLS construction resists compression set and thermal degradation, while the silicone beading ensures a perfect seal even under extreme operating conditions. Lightweight design (0.1 lbs) simplifies installation without compromising strength. Perfect for riders seeking uncompromising performance and peace of mind on the road.
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Ensure flawless engine performance with COMETIC's premium primary gasket designed for Panhead, Shovelhead, and Evo Big Twin models. This high-performance solution combines multi-layer steel (MLS) durability with silicone beading for maximum sealing reliability.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides exceptional heat resistance and sealing integrity for demanding engine environments.
- 0.015in Thickness: Optimized single-layer design for precise fitment and easy installation on Big Twin primary drive covers.
- Silicone Beading: Enhances sealing performance and prevents fluid leaks under high-pressure conditions.
- Universal Fit: Compatible with all primary drive covers on Panhead, Shovelhead, and Evo Big Twin engines.
Why Choose This Product
Upgrade your engine's reliability with a gasket engineered for long-term durability and leak-proof performance. The MLS construction resists compression set and thermal degradation, while the silicone beading ensures a perfect seal even under extreme operating conditions. Lightweight design (0.1 lbs) simplifies installation without compromising strength. Perfect for riders seeking uncompromising performance and peace of mind on the road.
| SKU | GMC71ACED5 |
|---|---|
| MPN | C9607F5 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Panhead Big Twin | 1948-1984 |
| Harley-Davidson | Shovelhead Big Twin | 1966-1984 |
| Harley-Davidson | Evolution Big Twin | 1984-1999 |
Frequently Asked Questions
Yes, C9607F5 fits 1984-1999 Evolution Big Twin models including all Softails.
0.015" MLS gasket is slightly thicker than stock paper gasket but designed as direct replacement.
Recommended to inspect/replace O-rings on primary cover bolts during installation.
No, MLS gaskets are single-use only. The sealing beads crush during installation.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Socket set (7/16", 1/2")
- Torque wrench
- Gasket scraper
- Primary cover gasket remover
Pro Tips
- Clean both surfaces with brake cleaner and plastic scraper
- Torque bolts in criss-cross pattern to 84-108 in-lbs
- Apply light coat of assembly lube to bolt threads
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Over-torquing primary cover bolts
- Not using proper torque sequence
Comparison vs Stock/OEM
Multi-layer steel with silicone beading vs stock paper gasket
Improvements
- Superior sealing under high heat/pressure
- Will not burn through like paper gaskets
- Re-usable mating surfaces (gasket single use)
- Better tolerance for surface imperfections
Considerations
- Slightly higher cost
- Single use only
Durability & Warranty
Expected Lifespan
Lifetime of primary drive service interval (typically 10,000+ miles)
Warranty
Cometic 1-year warranty
Maintenance
Inspect during primary service. Replace every disassembly.
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