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Start ShoppingCometic C9540 MLS Intake/Exhaust Gasket - Durable 0.040 in. 76mm for High-Performance Engines
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Description
Upgrade your engine's sealing performance with Cometic's C9540 MLS Intake/Exhaust Gasket. Engineered for durability and precision, this gasket ensures reliable sealing under high-performance conditions, preventing leaks and maintaining optimal engine efficiency.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides superior heat resistance and sealing reliability for demanding engine environments.
- 0.040 in. Thickness: Optimized compression for secure sealing without compromising engine performance.
- 76mm Bore Size: Precision-engineered for perfect fitment on compatible engine blocks.
- Lightweight Design: Weighs just 0.1 lbs for easy installation and reduced engine load.
Why Choose This Product
Cometic's C9540 gasket is trusted by racers and enthusiasts for its unmatched durability and leak-proof performance. The MLS construction resists warping and degradation, ensuring long-term reliability. Its precise 76mm bore size guarantees a perfect fit, while the 0.040 in. thickness balances sealing power with engine efficiency. Whether you're modifying a high-performance engine or maintaining a stock setup, this gasket delivers consistent sealing under extreme temperatures and pressures.
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Upgrade your engine's sealing performance with Cometic's C9540 MLS Intake/Exhaust Gasket. Engineered for durability and precision, this gasket ensures reliable sealing under high-performance conditions, preventing leaks and maintaining optimal engine efficiency.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides superior heat resistance and sealing reliability for demanding engine environments.
- 0.040 in. Thickness: Optimized compression for secure sealing without compromising engine performance.
- 76mm Bore Size: Precision-engineered for perfect fitment on compatible engine blocks.
- Lightweight Design: Weighs just 0.1 lbs for easy installation and reduced engine load.
Why Choose This Product
Cometic's C9540 gasket is trusted by racers and enthusiasts for its unmatched durability and leak-proof performance. The MLS construction resists warping and degradation, ensuring long-term reliability. Its precise 76mm bore size guarantees a perfect fit, while the 0.040 in. thickness balances sealing power with engine efficiency. Whether you're modifying a high-performance engine or maintaining a stock setup, this gasket delivers consistent sealing under extreme temperatures and pressures.
| SKU | GM9788D781 |
|---|---|
| MPN | C9540 |
| UPC/GTIN | 191070017934 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Kawasaki | KX450 | 2019-2025 |
| Kawasaki | KX450X | 2019-2025 |
| KTM | 450 SX-F | 2020-2025 |
| KTM | 450 SX-F Factory Edition | 2020-2025 |
| Husqvarna | FC 450 | 2020-2025 |
| Husqvarna | FC 450 Rockstar Edition | 2020-2025 |
| GasGas | MC 450F | 2021-2025 |
Frequently Asked Questions
Yes, confirmed fitment for 2019-2025 Kawasaki KX450 models.
Yes, direct replacement with upgraded MLS construction for better sealing.
Recommended to use new or ARP head studs for best results with MLS gaskets.
MLS provides superior sealing, heat resistance, and durability for high-performance or high-compression builds.
Yes, Cometic MLS gaskets accommodate most aftermarket valve jobs up to +2mm overbore.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- socket set
- torque wrench
- gasket scraper
- RTV sealant
Pro Tips
- Clean all surfaces with brake cleaner
- Apply thin layer of RTV to cylinder head ports
- Torque in crisscross pattern to spec (typically 8-10 ft-lbs)
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Over-torquing bolts
- Reusing old bolts
Comparison vs Stock/OEM
OEM uses paper/composite gasket; Cometic MLS is multi-layer steel
Improvements
- Better sealing under high compression/heat
- Reusable if undamaged
- Supports higher boost/porting
Considerations
- Requires precise torque specs
- May need head studs
Durability & Warranty
Expected Lifespan
Engine rebuild lifespan (100+ hours racing)
Warranty
1 year manufacturer defect warranty
Maintenance
Inspect during top-end services; reusable if flat and undamaged
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