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ACL 4G63/4G64 6-Bolt High Performance Main Bearings

Engineered for the rigorous demands of high-output engines, this ACL 0.25mm oversized main bearing set is the gold standard for 6-bolt 4G63 and 4G64 engine builds. Designed specifically for 1st Gen DSM enthusiasts and classic Mitsubishi platform owners, these bearings provide superior load-carrying capacity and fatigue resistance under extreme racing conditions.

Key Technical Features

• Precision Fitment: Engineered specifically for 6-bolt crankshafts requiring 0.25mm oversized clearance.
• Advanced Metallurgy: Multi-layer construction featuring hardened steel backs and high-lubricity overlay for reduced friction.
• Enhanced Oil Distribution: Optimized oil groove geometry ensures consistent lubrication to critical journals during high-RPM operation.
• Durability: Designed to withstand the thermal and mechanical stresses of turbocharging and high-boost applications.

Whether you are performing a full engine rebuild on a classic Dodge Colt or preparing a 4G63 for competitive track use, these bearings offer the reliability you need. The precision tolerances ensure a perfect oil film thickness, protecting your crankshaft from premature wear and catastrophic failure. Trust in the proven engineering of ACL to keep your engine running at its peak potential. For all your high-performance engine component needs, look no further than GGCRACING.