This premium standard-size (STD) ACL Race Series Big End Conrod Bearing Set (Part No. 6B2306H-STD) is explicitly engineered for high-performance, high-RPM, and competitive motorsport applications. Developed to withstand the intense loads of built and modified engines, this tri-metal kit offers unparalleled durability for the iconic Holden and General Motors 3.8-litre 3800 V6 pushrod engine platforms.

Whether you are putting together a tough naturally aspirated street tracker, setting up a high-boost turbo combination, or upgrading a factory supercharged layout, ACL Race Series bearings deliver the rugged metallurgy required where standard passenger-car components fall short. Utilizing ACL's legendary tri-metal copper-lead F781 matrix composition, these premium bearings provide superior fatigue limits, maximum crush structural stability, and precise oil film clearance tolerances to safeguard your crank journals under extreme load cycles.

Official Engine Application Fitment

This high-performance big end rod bearing set provides direct fitment for the following 3.8L V6 engine iterations:

• Holden 3800 V6 (L27 / LN3): 3.8L Pre-Ecotec variants found across VN, VP, and VR Commodore chassis configurations (1988–1995).
• Holden Ecotec V6 (L36): 3.8L Naturally Aspirated workhorse engine found across VS, VT, VX, and VY Commodore chassis configurations (1995–2004).
• Holden Supercharged V6 (L67): 3.8L Factory Eaton M90 supercharged high-performance platform found in Calais, Statesman, Monaro CV6, and S/SS Commodore lines.

ACL Race Series Structural Advantages

• High-Strength Tri-Metal Design: Formulated with ACL's legendary F781 material layer configuration to absorb heavy ignition load impacts while preventing high-friction overlay fatigue.
• Hardened Steel Backing: Drastically optimizes bearing shell retention within the connecting rod tunnel boring, preventing bearing spin or shifting under aggressive downshifts or redline limits.
• Precise Tolerance Control: Engineered with tight wall thickness parameters and increased eccentricity to foster ideal hydrodynamic oil film retention.
• Large Fillet Chamfers: Fully accommodates large-radius performance crankshaft profiles without edge binding or journal tracking complications.

Technical Specifications

• Bearing Type: Connecting Rod / Conrod Big End Bearings Set
• Sizing Profile: Standard Size (STD)
• Material Grade: Tri-Metal F781 Copper-Lead Matrix Composition
• Manufacturer Part Number: 6B2306H-STD
• Target Shaft Sizing (Journal): 57.117mm / 57.137mm (2.2487" - 2.2495")
• Target Housing Bore (Tunnel): 60.300mm / 60.312mm (2.3740" - 2.3745")

Note: This is a Standard (STD) sizing profile kit meant for unmodified factory journal diameters. Always verify your exact crankshaft journal roundness, rod tunnel alignment steps, and target vertical oil clearances on your build bench using plastigage or precision micrometres during engine mockup assembly prior to final installation.