ACL Bearings 4B2636-040 Connecting Rod Bearing Set Undersize - 040

The ACL Bearings 4B2636-040 is a high-performance connecting rod bearing set designed for engines requiring .040" (1.00mm) undersize crankshaft journals. ACL Race Series bearings are engineered with advanced tri-metal construction to deliver exceptional durability in demanding street and performance applications.

Key Features:

• Tri-metal design featuring hardened steel backing for superior bearing lining support and retention
• High-strength overlay plate with reduced thickness for improved fatigue resistance
• Increased eccentricity to compensate for bore distortion at high RPM operation
• .040" undersize specification for reground or machined crankshaft journals
• Elimination of flash plating on bearing backs improves heat transfer and maximizes housing grip
• Tight, consistent wall tolerances help maintain precise oil clearances
• Hardened steel backs enhance bearing retention and prevent bearing spin under extreme conditions

ACL Race Series bearings combine precision engineering with state-of-the-art metallurgy to provide reliable performance in high-load, high-RPM conditions. The copper-lead-tin lining material offers excellent fatigue strength and anti-seizure properties, while the thin overlay layer provides superior conformability and wear resistance. These bearings are suitable for both performance street builds and motorsports applications where durability is critical.