ACL Bearings 8B663HX-STD H-Series Standard Connecting Rod Bearings for Small Block Chevy and GM LS-Series

The ACL Bearings 8B663HX-STD connecting rod bearing set is designed for Small Block Chevy and GM LS-Series engines requiring H-Series performance with standard sizing and extra oil clearance. These bearings are engineered for demanding street, performance, and competition applications where consistent oil control and dependable load handling are essential. The set provides a precise fit for properly prepared connecting rods and crankshaft journals.
The H-Series design supports enhanced durability under increased engine loads, higher operating speeds, and performance-oriented conditions. Extra oil clearance helps accommodate applications that require additional lubrication capacity, making the 8B663HX-STD a practical choice for engine builders and technicians following specific crankshaft and bearing clearance specifications. Always verify journal measurements, bearing alignment, and final clearances before installation.
Built for Small Block Chevy and GM LS-Series engine platforms, this ACL Bearings rod bearing set offers reliable construction and consistent manufacturing quality. The standard-size configuration is intended for crankshaft journals that measure within the standard specification, while the extra-clearance design supports builds with clearance requirements beyond conventional standard bearings. Use the manufacturer’s recommended assembly procedures, lubrication practices, and torque specifications to help ensure proper engine performance and service life.
The ACL Bearings 8B663HX-STD set is supplied for connecting rod bearing replacement or performance engine assembly. It is not air restricted and does not require truck freight, making it suitable for standard delivery handling. Confirm engine compatibility and required bearing clearance before ordering to ensure the correct application for your build.

Features:

• H-Series connecting rod bearing design for performance and high-load engine applications

• Standard-size bearing configuration for standard crankshaft journals

• Extra oil clearance to support specific performance engine clearance requirements

• Compatible with Small Block Chevy and GM LS-Series engines

• Designed for consistent fit, oil control, and dependable durability

• Part Number: 8B663HX-STD

• Brand: ACL Bearings

• Not air restricted

• Does not require truck freight