The ACL 8B663A-STD is an A-Series connecting rod bearing set for Small Block Chevy / GM LS-Series engines. This standard-size set is sized for a stock, unmachined rod journal.
Specifications:
- Type: Connecting Rod Bearing Set
- Series: A-Series
- Size: Standard
- Engine Fitment: Small Block Chevy / GM LS-Series
- Part Number: 8B663A-STD
FAQ
What does "Standard" size mean on this ACL bearing set?
It means the bearing is sized for a stock, unmachined Small Block Chevy / GM LS-Series rod journal.
What engines does the ACL 8B663A-STD fit?
This connecting rod bearing set fits Small Block Chevy and GM LS-Series engines.
What if my crankshaft has been machined undersize?
If the rod journals have been machined undersize, this standard-size set is not correct; use the matching undersize part number for this application.

