SUBARU EJ16 EJ18 EJ20 EJ22 EJ25, ACL Race Series Main Bearings (5M8309H)
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High-Performance ACL Race Series Main Bearings for Subaru Engines
Upgrade your Subaru EJ16, EJ18, EJ20, EJ22, or EJ25 engine with the ACL Race Series Main Bearings (5M8309H), engineered for superior performance under high RPM conditions. These bearings are a top choice for enthusiasts and professionals seeking reliability and durability in demanding environments.
Key features include:
- High Strength Overlay Plate: Reduced thickness for enhanced durability.
- Hardened Steel Backs: Ensures robust support for all Conrod Bearings.
- Increased Crush: Eliminates flash plating for a secure fit.
- 3/4 Grooving: Optimizes oil supply to main bearings.
- Consistent Wall Tolerances: Guarantees precision and reliability.
- Oversize Chamfers: Applied where necessary for improved fitment.
| Product Name | SUBARU EJ16 EJ18 EJ20 EJ22 EJ25, ACL Race Series Main Bearings (5M8309H) |
|---|---|
| Brands | ACL |
| Engine | EJ16, EJ18, EJ20, EJ22, EJ25 |
| Make | Subaru |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What are the key features of the ACL Race Series Main Bearings (5M8309H) for Subaru engines?
The ACL Race Series Main Bearings (5M8309H) feature a high strength overlay plate for enhanced durability, hardened steel backs for robust support, increased crush for a secure fit, and 3/4 grooving to optimise oil supply. They also have consistent wall tolerances and oversize chamfers where necessary for improved fitment.
What Subaru engine models are compatible with the ACL Race Series Main Bearings (5M8309H)?
These main bearings are designed for use with Subaru EJ16, EJ18, EJ20, EJ22, and EJ25 engines, making them suitable for a range of Subaru performance builds.
What machining considerations should I keep in mind when installing these main bearings?
When installing the ACL Race Series Main Bearings, ensure that the main caps are line-bored after installation to maintain proper clearances. It's also crucial to check the bearing journal sizes and ensure the crankshaft is properly aligned.
How do the ACL Race Series Main Bearings perform under high RPM conditions?
These bearings are engineered for superior performance under high RPM conditions, providing reliability and durability in demanding environments. However, optimal performance will depend on proper installation, clearances, and lubrication.
Do I need to modify my engine to use the ACL Race Series Main Bearings?
Generally, no specific modifications are required to use these bearings, but ensure that your engine's main journals are within OEM specifications. Always verify that your engine is properly machined and assembled for best results.
