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Start ShoppingCOMETIC Twin Cam EST MLS Head Gasket Kit - High-Performance Gaskets for Twin Cam Engines
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Description
Upgrade your Twin Cam EST engine's sealing system with Cometic's C9172 MLS head gasket kit. Engineered for durability and precision, this comprehensive gasket set ensures optimal compression, reduced leaks, and long-term reliability for high-performance riding.
Key Features
- Multi-Layer Steel (MLS) Head Gaskets: Superior heat resistance and sealing integrity for high-output engines.
- Composite Intake/Exhaust Gaskets: Lightweight yet durable construction for enhanced thermal efficiency.
- 0.040 in. Thickness: Standard bore compatibility for easy installation on Twin Cam EST engines.
- Complete Top-End Kit: Includes head, base, cylinder, intake, exhaust, and valve cover gaskets for full system coverage.
Why Choose This Product
Cometic's C9172 kit delivers unmatched sealing performance for Twin Cam EST engines, reducing the risk of head gasket failure during aggressive riding. The MLS design withstands extreme temperatures and pressures, while composite materials provide flexibility for perfect sealing. This comprehensive set eliminates the need for multiple purchases, saving time and ensuring all critical sealing points are covered. Ideal for riders seeking reliable performance without compromising on power or longevity.
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Upgrade your Twin Cam EST engine's sealing system with Cometic's C9172 MLS head gasket kit. Engineered for durability and precision, this comprehensive gasket set ensures optimal compression, reduced leaks, and long-term reliability for high-performance riding.
Key Features
- Multi-Layer Steel (MLS) Head Gaskets: Superior heat resistance and sealing integrity for high-output engines.
- Composite Intake/Exhaust Gaskets: Lightweight yet durable construction for enhanced thermal efficiency.
- 0.040 in. Thickness: Standard bore compatibility for easy installation on Twin Cam EST engines.
- Complete Top-End Kit: Includes head, base, cylinder, intake, exhaust, and valve cover gaskets for full system coverage.
Why Choose This Product
Cometic's C9172 kit delivers unmatched sealing performance for Twin Cam EST engines, reducing the risk of head gasket failure during aggressive riding. The MLS design withstands extreme temperatures and pressures, while composite materials provide flexibility for perfect sealing. This comprehensive set eliminates the need for multiple purchases, saving time and ensuring all critical sealing points are covered. Ideal for riders seeking reliable performance without compromising on power or longevity.
| SKU | GMC1BE41E2 |
|---|---|
| MPN | C9172 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Twin Cam 96/103 EST models | 2007-2017 |
| Harley-Davidson | FLH, FLT, FXST, FXD series | 2007-2017 |
Frequently Asked Questions
Yes, if it has Twin Cam 103 EST heads. Verify cylinder head casting number.
C9172 is for stock 96/103 bore. See C9173 or others for 4.0+ bore.
No, 0.040" thickness is stock replacement. Thinner options available for compression increase.
Complete top-end set: MLS head gaskets, base, intake, exhaust, cover gaskets, O-rings.
Installation Guide
Difficulty
Medium
Est. Time
2 hr 0 min
Tools Required
- torque wrench
- socket set
- gasket scraper
- feeler gauges
- engine stand (recommended)
Pro Tips
- Apply thin layer of RTV to corners where gaskets meet
- Torque in 3 stages following Harley sequence
- Check piston-to-valve clearance after install
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Incorrect torque sequence on head bolts
- Reusing old O-rings
Comparison vs Stock/OEM
MLS construction vs. stock composite; superior sealing under high pressure/temperature
Improvements
- Better heat resistance
- Handles higher compression
- Reduced bore distortion
Considerations
- Requires precise torque; more expensive than OEM
Durability & Warranty
Expected Lifespan
Engine life or until rebuild (50,000+ miles typical)
Warranty
1 year Cometic manufacturer defect warranty
Maintenance
Inspect during valve adjustments; no specific maintenance needed
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