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Start ShoppingCOMETIC C9164 Evo Big Twin EST Gasket Kit - High-Performance Engine Sealing Solution
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Description
Ensure peak engine performance with COMETIC's high-quality gasket kit designed for Evo Big Twin EST engines. This complete sealing solution delivers reliable durability and leak-free operation for riders demanding top-tier performance.
Key Features
- Advanced Material Construction: Made from high-temperature resistant rubber and silicone compounds for long-lasting sealing integrity.
- Complete Kit Compatibility: Precision-engineered to fit original equipment specifications for seamless installation.
- Enhanced Leak Prevention: Multi-layered design minimizes oil and coolant leaks, protecting engine components.
Why Choose This Product
Upgrade your engine's reliability with a gasket kit built for extreme conditions. COMETIC's expertise in performance parts ensures this kit maintains optimal compression and sealing under high-stress riding scenarios. The easy-to-install design saves time during maintenance, while the durable materials reduce replacement frequency. Ideal for riders seeking dependable performance without compromising on power or efficiency.
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Complete the Build
Ensure peak engine performance with COMETIC's high-quality gasket kit designed for Evo Big Twin EST engines. This complete sealing solution delivers reliable durability and leak-free operation for riders demanding top-tier performance.
Key Features
- Advanced Material Construction: Made from high-temperature resistant rubber and silicone compounds for long-lasting sealing integrity.
- Complete Kit Compatibility: Precision-engineered to fit original equipment specifications for seamless installation.
- Enhanced Leak Prevention: Multi-layered design minimizes oil and coolant leaks, protecting engine components.
Why Choose This Product
Upgrade your engine's reliability with a gasket kit built for extreme conditions. COMETIC's expertise in performance parts ensures this kit maintains optimal compression and sealing under high-stress riding scenarios. The easy-to-install design saves time during maintenance, while the durable materials reduce replacement frequency. Ideal for riders seeking dependable performance without compromising on power or efficiency.
| SKU | GMAFCBD47A |
|---|---|
| MPN | C9164 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Evo Big Twin (FX/FXR/Softail/Dyna) | 1986-1994 |
| Harley-Davidson | FLH/FLT Touring models with Evo engine | 1987-1999 |
Frequently Asked Questions
Yes, C9164 fits 1986-1994 Evolution Big Twin engines including Softail models. Verify your exact engine displacement.
Yes, it's a full EST (Engine Service Type) kit including head, base, cases, transmission, and primary gaskets.
Standard 0.040 inch MLS head gasket. Cometic offers other thicknesses if you need to adjust compression.
Recommended to use ARP head studs/bolts for Evo rebuilds as stock bolts stretch.
Suitable for both; MLS gaskets handle higher compression ratios better than stock composite.
Installation Guide
Difficulty
Medium
Est. Time
4 hr 0 min
Tools Required
- torque wrench
- socket set
- gasket scraper
- engine hoist (for full teardown)
- feeler gauges
Pro Tips
- Apply thin layer of sealant to cork gaskets only if specified
- Torque head bolts in 3 stages following Harley pattern
- Replace O-rings and copper crush washers included in kit
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Incorrect torque sequence on head bolts
- Reusing old bolts
Comparison vs Stock/OEM
Cometic MLS head gaskets vs Harley paper/composite; superior sealing under high heat/pressure
Improvements
- Better durability
- Handles higher compression
- Reduced blow-by
- No asbestos
Considerations
- Slightly higher cost
- Requires clean surfaces for optimal seal
Durability & Warranty
Expected Lifespan
Engine life (100,000+ miles with proper install)
Warranty
1 year manufacturer defect warranty
Maintenance
Inspect during regular engine service; no special requirements
What Others Are Saying
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