ACL Bearings H-Series Main Bearing - Standard - Extra Oil Clearance - Small Block Chevy 5M909HX-STD 12100905 1988-1990 GMC K2500

1988-1990 GMC K2500

E-150 Econoline

Dexron-III

Chevy Differentials: How to Rebuild the 10-Bolt and 12-Bolt

4 to 5 in Lowered

ACL Bearings H-Series Main Bearing - Standard - Extra Oil Clearance - Small Block Chevy 5M909HX-STD 12100905 1988-1990 GMC K2500Product Description: Main Bearing H Series Standard Extra Oil Clearance Small Block Chevy High performance driving demands that you use the best parts. So rely on ACL's Race Series Products to perform to the exacting race standards you expect. They provide the dependability it takes to hold up under higher RPM conditions. The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance