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Start ShoppingAthena Cylinder Head - High-Silicon Aluminum Engine Component for Enhanced Performance
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Description
Elevate your engine's performance with Athena's precision-engineered cylinder head designed for power, durability, and lightweight efficiency. This high-silicon aluminum alloy component delivers superior heat dissipation and combustion efficiency for racers and enthusiasts alike.
Key Features
- High-Silicon Aluminum Alloy: Exceptional thermal conductivity and corrosion resistance for long-lasting performance
- CNC-Machined Combustion Chamber: Optimized high-compression design for maximum power output
- Lightweight Construction: 2.5 lbs (10-15% lighter than stock) for improved engine responsiveness
- 5-Port Design: Enhanced airflow management for increased horsepower and torque
- Pre-Assembled Components: Valve seats and guides installed, ready for immediate valve train assembly
Why Choose This Product
Upgrade to a cylinder head that combines advanced manufacturing with rider-focused benefits. The high-silicon alloy resists thermal fatigue while reducing overall engine weight, improving acceleration and fuel efficiency. The 5-port design optimizes airflow for power gains, while the pre-installed valve components save installation time. This precision-engineered solution is ideal for riders seeking competitive performance without compromising durability.
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Elevate your engine's performance with Athena's precision-engineered cylinder head designed for power, durability, and lightweight efficiency. This high-silicon aluminum alloy component delivers superior heat dissipation and combustion efficiency for racers and enthusiasts alike.
Key Features
- High-Silicon Aluminum Alloy: Exceptional thermal conductivity and corrosion resistance for long-lasting performance
- CNC-Machined Combustion Chamber: Optimized high-compression design for maximum power output
- Lightweight Construction: 2.5 lbs (10-15% lighter than stock) for improved engine responsiveness
- 5-Port Design: Enhanced airflow management for increased horsepower and torque
- Pre-Assembled Components: Valve seats and guides installed, ready for immediate valve train assembly
Why Choose This Product
Upgrade to a cylinder head that combines advanced manufacturing with rider-focused benefits. The high-silicon alloy resists thermal fatigue while reducing overall engine weight, improving acceleration and fuel efficiency. The 5-port design optimizes airflow for power gains, while the pre-installed valve components save installation time. This precision-engineered solution is ideal for riders seeking competitive performance without compromising durability.| SKU | GM9E25D28A |
|---|---|
| MPN | S410485308002 |
| Brand | Athena |
| Category | Engine |
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Featured Review
| Make | Model | Years |
|---|---|---|
| KTM | 450 SX-F | 2019-2024 |
| KTM | 350 SX-F | 2019-2024 |
| KTM | 250 SX-F | 2019-2024 |
| Husqvarna | FC 450 | 2019-2024 |
| Husqvarna | FC 350 | 2019-2024 |
| Husqvarna | FC 250 | 2019-2024 |
| GasGas | MC 450F | 2019-2024 |
Frequently Asked Questions
Yes, it includes valve seats, guides, and is ready for valve train assembly.
Designed for Athena high-performance pistons. Stock pistons may not fit due to compression changes.
Yes, direct replacement for specified KTM/Husqvarna/GasGas models 2019-2024.
Recommended to remap fuel injection for optimal performance with increased compression.
Approximately 13.5:1 (verify with full kit specs).
Installation Guide
Difficulty
Hard
Est. Time
3 hr 0 min
Tools Required
- torque wrench
- socket set
- valve spring compressor
- micrometer
- feeler gauges
- engine stand recommended
Pro Tips
- Always replace head gasket and O-rings
- Check and set valve clearances to Athena specs (intake 0.10-0.15mm, exhaust 0.18-0.23mm)
- Use moly paste on head bolt threads
Common Mistakes to Avoid
- Incorrect valve clearance adjustment
- Over-torquing head bolts
- Not lapping valves properly
Comparison vs Stock/OEM
CNC-ported 5-port design vs stock 4-port; high-silicon alloy vs cast aluminum
Improvements
- 15-20% power increase
- Better heat dissipation
- Optimized combustion chamber
- Lighter weight
Considerations
- Requires top-end rebuild
- Higher compression needs premium fuel
Durability & Warranty
Expected Lifespan
3-5 years racing / 100+ hours motocross
Warranty
2 years manufacturer defect warranty
Maintenance
Inspect valves every 20 hours, check warpage annually
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