One engine set of new ACL brand .010 oversize main bearings, part number 5M1867-010, 5M9423-010 or MB5128AM.  These fit:

Isuzu I-Mark 1.6L 1588cc 1989
Isuzu Impulse 1.6L 1588cc 1990 - 1992
Isuzu Stylus 1.6L 1588cc 1991 - 1992
Geo Storm 1.6L 1588cc 1990 - 1993