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Engineered for Precision and Reliability

The ACL Race Series 0.005mm Oversized Main Bearings are the gold standard for Subaru EJ20, EJ22, and EJ25 engine builds. Designed specifically for engines where a slightly tighter clearance or specific crankshaft sizing is required, these bearings offer the performance and durability that professional engine builders rely on. Featuring the legendary ACL Race construction, these bearings are built to withstand the rigors of high-performance driving.

Technical Advantages

• Optimized Geometry: Designed for the #5 thrust position, ensuring perfect fitment for Subaru EJ series blocks.
• Tri-Metal Construction: Combines a hardened steel back, a copper-lead intermediate layer, and a high-strength overlay for maximum durability.
• 0.005mm Oversize: Provides the perfect adjustment for precision-machined crankshafts, maintaining ideal oil pressure.
• Reduced Friction: Advanced surface finish minimizes friction, allowing for cooler operation and increased power delivery.
• Durability: Built to handle the stresses of turbocharged and high-compression setups.

When you are pushing your Subaru to the limit, every component in your rotating assembly matters. These main bearings provide the necessary support to keep your crankshaft stable under high load, preventing premature wear and catastrophic failure. By choosing ACL, you are investing in decades of engineering excellence. Ensure your engine build is done right the first time with high-quality components from GGCRACING.