ACL Bearings 4M2037P-1.00 Performance Connecting Rod Bearing Set Oversize - 1.00mm

The ACL Bearings 4M2037P-1.00 is a high-performance connecting rod bearing set designed for precision engine builds requiring 1.00mm oversize bearings. ACL Race Series bearings are recognized throughout the motorsports world for their proven durability in demanding applications from NASCAR to NHRA competitions.

Advanced Tri-Metal Construction:

• High-strength steel backing with hardened construction on rod bearings for improved bearing retention and support
• Copper-lead-tin lining layer (0.3mm typical thickness) provides excellent fatigue strength while remaining deformable
• Nickel barrier layer prevents tin migration and maintains lining integrity
• Lead-tin-copper overlay (0.013-0.018mm) with reduced thickness on rod bearings for superior fatigue resistance and seizure protection
• Elimination of flash plating on bearing backs improves heat transfer and maximizes grip in housing

Performance Features:

• Increased crush for improved bearing retention under high-RPM conditions
• Enhanced eccentricity compensates for bore distortion at high RPM and assists in hydrodynamic oil film formation
• Precision-machined to tolerances as fine as 0.006mm (0.00025 inches)
• Engineered for extreme accuracy with wall thickness consistency

ACL bearings combine advanced metallurgy, precision engineering, and race-proven design to deliver the endurance and reliability required for high-performance engine builds. The 1.00mm oversize specification allows for proper fitment on reground crankshafts.