The ACL 5M590H-10 is a main bearing set from ACL's H-Series line, machined to a 0.010 in undersize specification for Small Block Ford engines. This size is intended for use where the crankshaft main journal has been reground to that 0.010 in undersize dimension, not for a stock journal.
Specifications:
- Type: Main Bearing Set
- Series: H-Series
- Size: 0.010 in Undersize
- Engine Fitment: Small Block Ford
- Part Number: 5M590H-10
FAQ
What size is the ACL 5M590H-10 bearing set?
It is machined to a 0.010 in undersize specification, for use with a main journal that has been reground to that dimension.
What engines does the ACL 5M590H-10 fit?
It is designed for Small Block Ford engines.
Is this a Standard-size bearing?
No, it is a 0.010 in undersize bearing, not the Standard-size set.
What ACL series is the 5M590H-10 part of?
It belongs to ACL's H-Series line of engine bearings.

