ACL Bearings 8B634P-30 Performance Connecting Rod Bearing Set 0.30mm Oversized Ford 289/302

The ACL Bearings 8B634P-30 is a high-performance trimetal connecting rod bearing set designed for Ford small block V8 engines, including 255, 289, and 302 cubic inch applications from 1962 to 1998. This bearing set features a 0.30mm (0.012 inch) oversize specification for use with machined crankshafts, making it ideal for rebuilt or performance engines.

Race-Proven Performance Features:

• Trimetal construction with high-strength overlay plate and reduced thickness for improved fatigue resistance
• Hardened steel backing on all rod bearings for enhanced support and retention in the housing
• Increased crush design ensures superior bearing retention during high-RPM operation
• Elimination of flash plating on bearing backs improves heat transfer and maximizes grip
• Increased eccentricity compensates for bore distortion at high RPM and assists hydrodynamic oil film formation
• Tight, consistent wall tolerances help maintain precise bearing clearances

ACL Race Series bearings are engineered to withstand the demands of high-performance and racing applications, combining advanced metallurgy with precision manufacturing. This bearing set is manufactured to ISO-certified standards and provides the durability and reliability required for both street performance and competition engines.