ACL Bearings 5M1038A-STD Standard Main Bearing Set Small Block Chevy - 400

ACL's A-Series main bearings feature a proprietary composition of aluminum, tin, and silicon with a steel backing, providing outstanding wear resistance and exceptional load-carrying capabilities. These Aluglide main bearings were specifically developed for OEM engines and have the inherent physical properties perfectly suited for replacement applications.

Key Features:

• Proprietary aluminum, tin, and silicon composition with steel backing delivers excellent strength, anti-seizure, anti-wear, embeddability and anti-corrosion characteristics
• Bearing O.D. or block housing bore: 2.8416 inches
• Designed for the Small Block Chevy 400 engine's unique 2.65-inch main bearing journal
• Bimetal aluminum construction matches OEM standard parts with advantages over other OEM replacements
• Standard size for use with standard crankshaft journals

In a relatively short time since its introduction, Aluglide engine bearings have become a dominant factor in engine bearing materials, with the combination of aluminum, tin and silicon creating an alloy with exceptional wear resistance, outstanding strength and excellent load-carrying characteristics. This complete main bearing set provides reliable protection for Small Block Chevy 400 V8 engine rebuilds and performance applications.