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Start ShoppingCOMETIC C9607F1 MLS Primary Gasket for Panhead/Shovelhead/Evo Big Twin Engines – Durable & Reliable Sealing Solution
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Description
Ensure optimal engine performance with COMETIC's premium primary gasket designed for Panhead, Shovelhead, and Evo Big Twin engines. This multi-layer steel (MLS) gasket with silicone beading provides a reliable seal to prevent leaks and maintain peak power output.
Key Features
- Multi-Layer Steel (MLS) Construction: Durable, heat-resistant material for long-lasting sealing performance.
- Silicone Beading: Ensures a perfect seal and prevents oil leaks under high-pressure conditions.
- 0.015 in. Thickness: Standard thickness for precise fit and optimal compression.
- Precision Fit: Engineered to fit primary drive covers on Big Twin engines for hassle-free installation.
Why Choose This Product
Upgrade your engine's reliability with a gasket built for high-performance motorcycles. The MLS construction resists warping and degradation, while silicone beading eliminates leaks. Perfect for riders who demand durability and precision in their power sports equipment.
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Ensure optimal engine performance with COMETIC's premium primary gasket designed for Panhead, Shovelhead, and Evo Big Twin engines. This multi-layer steel (MLS) gasket with silicone beading provides a reliable seal to prevent leaks and maintain peak power output.
Key Features
- Multi-Layer Steel (MLS) Construction: Durable, heat-resistant material for long-lasting sealing performance.
- Silicone Beading: Ensures a perfect seal and prevents oil leaks under high-pressure conditions.
- 0.015 in. Thickness: Standard thickness for precise fit and optimal compression.
- Precision Fit: Engineered to fit primary drive covers on Big Twin engines for hassle-free installation.
Why Choose This Product
Upgrade your engine's reliability with a gasket built for high-performance motorcycles. The MLS construction resists warping and degradation, while silicone beading eliminates leaks. Perfect for riders who demand durability and precision in their power sports equipment.
| SKU | GM6C435370 |
|---|---|
| MPN | C9607F1 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Big Twin (Panhead, Shovelhead, Evolution) | 1948-1999 |
| Harley-Davidson | Panhead Big Twin | 1948-1984 |
| Harley-Davidson | Shovelhead Big Twin | 1966-1984 |
| Harley-Davidson | Evolution Big Twin | 1986-1999 |
Frequently Asked Questions
Yes, C9607F1 fits 1986-1999 Evolution Big Twin models including Softail, Dyna, and Touring.
0.015" (standard) for stock primary covers. Use 0.030" for aftermarket covers with taller studs.
Yes, multi-layer steel construction provides superior sealing and durability over OEM paper gaskets.
Yes, fill primary with proper Harley-Davidson Formula+ or equivalent after installation.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Socket set (7/16", 1/2", 9/16")
- Torque wrench
- Gasket scraper
- Primary cover bolts
Pro Tips
- Clean both surfaces with brake cleaner and plastic scraper
- Torque primary bolts in crisscross pattern to 84-108 in-lbs
- Apply light oil to gasket beading before installation
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Over-torquing primary bolts
- Using old derby cover gasket
Comparison vs Stock/OEM
Multi-layer steel vs single-layer paper/composite
Improvements
- Superior sealing under high heat/pressure
- Will not burn through like paper gaskets
- Re-usable multiple times if undamaged
- Better tolerance for surface imperfections
Considerations
- Slightly more expensive than paper
- Requires perfectly clean surfaces
Durability & Warranty
Expected Lifespan
Engine rebuild lifespan (50,000+ miles)
Warranty
Cometic 1-year warranty
Maintenance
Inspect during primary service. Reusable if undamaged.
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