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High-Performance ACL Race Series Main Bearings

When rebuilding your Mitsubishi 4G63 or 4G64 engine, precision is non-negotiable. These ACL Race Series main bearings are specifically designed for high-performance applications, providing the durability needed for high-RPM operation and increased cylinder pressures. This 0.25mm oversized set is ideal for crankshafts that have been machined to compensate for wear or to achieve specific clearances.

Key Features and Benefits:

• Tri-metal construction for superior load-carrying capacity
• Precision-machined for consistent oil film thickness
• Enhanced fatigue resistance under extreme stress
• Compatible with 7-bolt 4G63/4G64 engine blocks
• Ideal for street-strip and track-focused builds

These bearings are engineered to provide the perfect balance between oil flow and load support, ensuring your engine remains reliable under heavy boost or high-rev conditions. Whether you are performing a full engine refresh or a high-horsepower build, these ACL bearings offer the quality and consistency that professional engine builders trust. Ensure your crankshaft is properly supported with the industry-leading technology found in every set at GGCRACING.