ACL 4G63/4G64 6-Bolt Extra Clearance Main Bearings

For engine builders pushing the limits of their 6-bolt 4G63 and 4G64 platforms, managing oil clearance is critical. The ACL 'HX' series main bearings provide that extra bit of clearance needed for high-performance applications where oil temperature and pressure fluctuate significantly. These bearings are specifically designed for 1st Gen DSM builds that require a more forgiving tolerance to prevent oil starvation at high RPMs.

Performance Benefits

• Extra Oil Clearance: Designed to provide slightly more room for oil flow, ideal for high-heat and high-boost applications.
• Superior Fatigue Resistance: Built with high-strength materials to prevent deformation under heavy load.
• Optimized Geometry: Precision-engineered for perfect fitment on 6-bolt crankshafts.
• Reliability: Reduces the risk of bearing failure in high-output engines by promoting better cooling through increased oil volume.

Choosing the right clearance is essential for any serious engine build. These extra clearance bearings are the ideal solution for those who want to ensure their engine stays lubricated under the most intense racing conditions. By allowing for a slightly thicker oil film, you gain an extra layer of protection for your crankshaft journals. Don't compromise on your engine's longevity; choose the performance-proven reliability of ACL for your next build. Find all your essential engine upgrades right here at GGCRACING.