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Start ShoppingCOMETIC C9688 Sportster Head/Base Gasket - MLS Multi-Layer Steel Gasket for High-Performance Engines
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Description
Upgrade your Sportster engine's reliability with COMETIC's C9688 MLS head/base gasket. Engineered for high-performance applications, this durable gasket ensures perfect sealing and long-lasting power delivery for motorcycle riders.
Key Features
- Multi-Layer Steel (MLS) Construction: Superior sealing capabilities for high-temperature and high-pressure engine environments
- 0.040 in. Thickness (1.02mm): Optimal compression and heat dissipation for enhanced engine efficiency
- 3.875 in. Bore (98.43mm): Precision-engineered fit for Sportster engines
- Head Gasket Dimensions: Perfectly sized for Sportster engine compatibility
- 0.2 lbs Weight: Lightweight yet durable construction for easy installation
Why Choose This Product
COMETIC's C9688 gasket delivers unmatched durability and sealing performance for Sportster engines. The MLS design prevents blow-by and coolant leaks, while precise specifications ensure a perfect fit. Ideal for riders seeking reliable power and long-term engine protection. Whether you're modifying your Sportster or maintaining its performance, this gasket provides peace of mind with its high-quality construction and engineered fit.
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Upgrade your Sportster engine's reliability with COMETIC's C9688 MLS head/base gasket. Engineered for high-performance applications, this durable gasket ensures perfect sealing and long-lasting power delivery for motorcycle riders.
Key Features
- Multi-Layer Steel (MLS) Construction: Superior sealing capabilities for high-temperature and high-pressure engine environments
- 0.040 in. Thickness (1.02mm): Optimal compression and heat dissipation for enhanced engine efficiency
- 3.875 in. Bore (98.43mm): Precision-engineered fit for Sportster engines
- Head Gasket Dimensions: Perfectly sized for Sportster engine compatibility
- 0.2 lbs Weight: Lightweight yet durable construction for easy installation
Why Choose This Product
COMETIC's C9688 gasket delivers unmatched durability and sealing performance for Sportster engines. The MLS design prevents blow-by and coolant leaks, while precise specifications ensure a perfect fit. Ideal for riders seeking reliable power and long-term engine protection. Whether you're modifying your Sportster or maintaining its performance, this gasket provides peace of mind with its high-quality construction and engineered fit.
| SKU | GM6336F26E |
|---|---|
| MPN | C9688 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Sportster XL883, XL1200 | 2004-2017 |
Frequently Asked Questions
Yes, C9688 fits 2004-2017 Sportster XL883/XL1200 models with 3.875" bore.
This is 0.040" MLS; stock is typically 0.060". Use for higher compression builds.
Recommended for optimal compression; check piston-to-valve clearance.
Yes, rated up to 98mm bore; verify your specific bore size.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- torque wrench
- socket set
- gasket scraper
- head bolt kit
Pro Tips
- Clean mating surfaces meticulously
- Follow Harley torque specs in criss-cross pattern
- Consider new ARP head studs for high compression
Common Mistakes to Avoid
- Not cleaning surfaces thoroughly
- Incorrect torque sequence
- Reusing old head bolts
Comparison vs Stock/OEM
MLS construction vs. stock composite; handles higher pressures and temperatures
Improvements
- Better sealing for high compression
- Increased durability under boost/nitrous
- Reduced chance of blowouts
Considerations
- Requires precise surface prep
- May need head milling
Durability & Warranty
Expected Lifespan
Engine rebuild lifespan (50,000+ miles typical)
Warranty
1 year Cometic manufacturer defect warranty
Maintenance
Inspect during valve adjustments; no specific maintenance required
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