MB4017SI 010GENERAL MOTORS 231 CI

The King Engine Bearings MB4017SI 010 is a set of SI-Series main bearings. These bi-metal, silicon aluminum bearings are designed as a direct replacement for OE applications and are suitable for aftermarket gasoline or diesel engine rebuilding, as well as performance engines with factory crankshafts.

These bearings feature an improved crankshaft finish to reduce microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. They also offer improved oil clearance, which helps reduce wear, increase engine life, and minimize operating noise, vibration, and excess oil flow. The set includes 1/2 groove bearings with the groove located at the upper position and are designed for a 0.010 in. (0.25mm) crankshaft undersize.