ACL 8B663HX-STD Race Rod Bearing Set for Chevy Small Block & LS V8 Engines

Regular price: $101.95
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Sale price: $101.95

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In Stock: 12

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Product Specification:

SKU:ACL8B663HX-STD

MPN: 8B663HX-STD

UPC: 9315726273258

Weight: 0.9 lb

Inventory: 12

Type: Bearings

Vehicle Fitment

Chevrolet Small Block V8 Engines (262ci, 302ci, 305ci, 307ci, 327ci, 350ci, 400ci OHV)
Chevrolet LS / Gen III & IV Vortec & Performance V8 Engines (5.3L LS, 5.7L LS1/LS6, 6.0L LS2/L76/L98, 6.2L LS3/LS9/LSA, LS7)
Holden V8 & similar GM small block applications with standard crank journals

Features

Race Series connecting rod bearing set designed for performance and high-RPM use
Standard size with extra oil clearance (+0.001" over standard) for performance builds
Tri-metal construction with hardened steel backing for strength and durability
High-strength overlay plate with reduced thickness for improved fatigue resistance
Improved heat transfer through bearings for consistent oil film at high RPM
Precise wall tolerances for consistent clearances and fit
Enlarged ID chamfers to clear large fillet crank radii in performance engines
Sold as complete set for all connecting rods in engine block

Specifications

Brand: ACL
Part Number: 8B663HX-STD
Type: Race Series connecting rod bearing set
Size: Standard journal (STD) with +0.001" extra oil clearance
Oil Clearance: +0.001" extra vs ACL standard H-STD set
Material: Tri-metal with hardened steel backing
Half Type: Upper & lower bearings included
Application Engines: Chevy Small Block OHV & LS Gen III/IV V8 families

Included Components

8x Connecting rod bearings (ACL 8B663HX-STD)

Product Description

The **ACL 8B663HX-STD Race Rod Bearing Set** is a high-performance connecting rod bearing solution engineered for a wide range of **Chevrolet small block and LS family V8 engines**, including 262ci through 400ci OHV small blocks and Gen III/IV LS variants from 5.3L up through performance platforms such as LS1, LS3, LS7, LS9, and LSA when running standard crank journal diameters. The "HX" designation means this set provides **approximately +0.001" of extra oil clearance** compared to the baseline H-STD bearings - ideal for performance builds, slightly modified engines, high RPM use, or applications where oil film thickness benefits from a bit of additional clearance.

Manufactured with tri-metal construction and hardened steel backing, these bearings are designed to resist fatigue under extreme conditions and promote robust hydrodynamic lubrication at elevated engine speeds. They feature high-strength overlay plates, precise wall tolerances, and enlarged ID chamfers to accommodate common performance crankshaft fillet radii. Sold as a complete set of eight bearings for connecting rods, the ACL 8B663HX-STD is a trusted choice for engine rebuilds, performance short blocks, and motorsport-oriented builds demanding durability and consistent bearing performance.