Acl Main Bearings - SBC 400 - Aluminum - Standard**if Plastic Packaging Is Opened, There Are No Returns Or Exchanges !!

ACL's A-Series main bearings are constructed from a proprietary composition of aluminum, tin, and silicon with a steel backing.  This gives these bearings outstanding wear resistance, and load-carrying capabilities.   Bimetal (aluminum) bearings are installed as OEM standard parts in todays engines, and ACL's construction and composition give these bearings an advantage over other OEM replacements.

• SB Chevy 400 Main
• Standard Size
• A-Series