ACL Race Series Engine Main Bearings Standard Size (7M2398H-STD) – For Holden 173/202 Inline 6

Race-Proven Crankshaft Protection for Your Classic Holden Build

When you are building a high-rpm or high-compression Holden six, factory-style replacements simply won't survive. The ACL Race Series 7M2398H-STD main bearing set is engineered to handle the severe mechanical loads, heavy counterweight balancing stresses, and punishing operational demands of vintage motorsport and modified street applications. Perfect for performance machine shops and classic restoration garages down under pushing old-school iron to the limit.

Why Choose ACL Race Series Bearings?

• Trimetal Performance Metallurgy: Features a robust steel backing coupled with a copper-lead-tin intermediate liner and a highly durable overlay layer to deliver elite load-carrying capacities.
• Increased Crush Value: Optimizes bearing retention within the block housings, improving structural stability and maximizing heat dissipation into the engine block.
• Enhanced Eccentricity Profile: Compels a highly efficient hydrodynamic oil film to form rapidly, safely compensating for inherent block and crank flex under maximum load conditions.
• Standard (STD) Size: Formulated for fresh performance assemblies where the crankshaft main journals remain uncut at factory dimensions.

???? Vehicle & Engine Compatibility

This kit fits a comprehensive range of iconic Australian Holden 6-cylinder pushrod engines:

• Engine Blocks: Holden 173ci (2850cc) and 202ci (3300cc) Overhead Valve (OHV) Inline-6 lines
• Motor Configurations: Traditional Red Motors, later-generation Blue Motors, and final-evolution EFI Black Motors
• Classic Vehicle Fitments: Holden Kingswood (HK, HT, HG, HQ, HJ, HX, HZ, WB), Torana (LC, LJ, LH, LX, UC), and early Commodore lines (VB, VC, VH, VK)

???? Specifications

• Brand: ACL Performance (Race Series)
• Part Number: 7M2398H-STD
• Type: Crankshaft Main Bearings
• Size: Standard (STD)
• Quantity: Complete main bearing set tailored for one 6-cylinder engine

Note: Always double-check your crankshaft journals with a precise micrometer prior to final assembly. This is a Standard size kit and cannot be used on crankshafts that have been machined undersize.

---

Quick ANZ Shipping Note

• For NZ & AU Customers: Fast overnight or economy courier dispatch options throughout New Zealand (North & South Islands) alongside rapid, fully tracked delivery options across Australia. Dispatched securely from local warehouse allocations direct to your performance workshop.