ACL Bearings 4B4135A-.25 Connecting Rod Bearing Set Oversize - 25

The ACL Bearings 4B4135A-.25 is a high-performance connecting rod bearing set designed specifically for Chrysler 345 cubic inch (5.7L) Hemi V8 engines. This Race Series bearing set features a .25 oversize specification, engineered for rebuilt engines where crankshaft connecting rod journals have been machined oversize to restore proper clearances and ensure optimal bearing fit.

Advanced Tri-Metal Construction:

• High-strength tri-metal design featuring steel backing, copper-lead intermediate layer, and durable overlay for superior load capacity
• Hardened steel backs improve bearing support and retention in the connecting rod housing
• Reduced thickness overlay plate enhances fatigue resistance under extreme conditions
• Optimized surface finish promotes excellent oil film formation and reduces friction

Race Series Engineering:

• Manufactured to micron-level tolerances for consistent wall thickness and crush
• Flash plating eliminated on bearing backs to improve heat transfer and maximize grip
• Designed to withstand elevated RPMs, increased loads, and high combustion pressures
• Precision-engineered for both high-performance street builds and competitive racing applications

ACL Race Series bearings are recognized throughout the motorsports world and have been proven in championship-winning engines across multiple racing disciplines. Each set includes all bearing halves required for a complete connecting rod installation. Professional installation with proper clearance checking using plastigage or micrometers is strongly recommended to ensure optimal performance and engine longevity.