ACL 5M7298H-01 Race Series .01mm Oversize Main Bearings for 1997-24 GM LS V8

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Product Specification:

SKU:ACL5M7298HXC-STD

UPC: 9315726457986

Weight: 1.2 lb

Inventory: 12

Type: Bearings

Vehicle Fitment

2002-2020 GM LS-series small-block V8 engines - 4.8L LR4/LY2, 5.3L LM7/L59/LM4/L33, 5.7L LS1/LS6, 6.0L LFA/LS2, 6.2L L99/LS3, and similar Gen III/IV variants
Found in: Chevrolet Corvette, Camaro, Silverado/Sierra, Tahoe/Suburban, Yukon, Holden/HSV models with LS engines

Features

ACL Race Series main bearing set designed for performance and high-RPM use
CT-1 friction-reducer coating applied to reduce friction and improve break-in
Extra oil clearance - 0.001 in. (≈0.025 mm) undersize for crankshaft undersize builds or performance tuning
Tri-metal copper-lead alloy construction for strength and fatigue resistance
3/4 oil groove design for optimized lubrication to conrod bearings
Hardened steel backing improves support and retention under load
Enlarged ID chamfers and increased eccentricity to help form hydrodynamic oil film at high RPM
Direct replacement for OEM main bearings when correct journal undersize is used

Specifications

Part Number: 5M7298HXC-STD
Brand: ACL
Series: Race Series Main Bearing Set (CT-1 Coated)
Size: Standard journal diameter with extra crank undersize clearance (-0.001 in.)
Material: Tri-metal copper-lead alloy with hardened steel backing
Groove: 3/4 oil groove (upper half)
Application: Main crankshaft bearings - upper & lower halves
Number of Bearings: 5 main positions (sold as complete set)
Engine Fitment: GM Gen III & Gen IV LS-family V8 engines (2002-2020)

Included Components

5x Main bearing shells - STD size, extra .001" clearance

Product Description

The **ACL 5M7298HXC-STD Race Series Main Bearing Set** is a precision engine bottom-end component engineered for **GM's Gen III and Gen IV LS-series small-block V8 engines** - including 4.8L LR4/LY2, 5.3L LM7/L59/LM4, 5.7L LS1/LS6, 6.0L LFA/LS2, and 6.2L L99/LS3 platforms found in Corvette, Camaro, Silverado/Sierra, Tahoe/Suburban, Yukon, and other GM performance vehicles from **2002 through 2020**. These bearings are from ACL's Race Series, built with a tri-metal copper-lead alloy and hardened steel backing for robust durability and fatigue resistance in high-RPM and high-load environments.

This CT-1 coated set features an extra **0.001 in. undersize (≈0.025 mm)** design that accommodates crankshaft journals machined undersize during rebuilds, helping maintain optimal oil film thickness and reliable lubrication under stress. The 3/4 oil groove enhances oil distribution, while the CT-1 dry-film friction reducer lowers break-in wear and improves early performance. Ideal for performance rebuilds, high-output engines, and motorsport applications, the 5M7298HXC-STD bearings deliver enhanced lubrication performance while maintaining precise clearances when compared to uncoated or standard sets.