ACL Bearings 8B663HXNC-STD Race Series High Performance Rod Bearings

The ACL Race Series 8B663HXNC-STD connecting rod bearings are engineered for high-performance and racing applications where standard OEM bearings simply cannot meet the demands of increased power and aggressive engine operation. Built to ACL's renowned Race Series specifications, these bearings deliver superior load capacity, tighter tolerances, and enhanced durability under extreme conditions.

ACL Race Series bearings are manufactured using a tri-metal construction featuring a high-strength steel backing, an intermediate layer of copper-lead or aluminum alloy, and a precision-applied overlay — providing exceptional fatigue resistance, conformability, and load-bearing capability far beyond stock replacement bearings.

Key Features:

• Race Series high-performance connecting rod bearings
• Tri-metal construction for superior fatigue strength and load capacity
• Tighter-than-OEM manufacturing tolerances for precise oil film control
• Enhanced overlay alloy resists wear, corrosion, and cavitation erosion
• Standard (STD) sizing for use with standard, unmachined journals
• Engineered for forced induction, high-RPM, and performance street/strip applications
• Manufactured to strict quality control standards at ACL's ISO-certified facility

The 8B663HXNC-STD designation indicates a standard-size, 8-cylinder application bearing set with ACL's HX (high-performance extra) race overlay and NC (narrowed crush) design features, optimized for engines that have been built or blueprinted to close tolerances. These bearings are a direct upgrade for performance builders seeking a reliable, race-proven solution at standard journal dimensions.