Perfect Circle MS1038H9 Main Bearing Set 0.009 Undersize Small Block Chevy

The Perfect Circle MS1038H9 is a precision-engineered main bearing set designed for small block Chevrolet engines requiring 0.009 inch undersize bearings. This H-Series bearing set provides reliable crankshaft support for engines with journals that have been ground undersize during rebuilding or performance upgrades.

Key Features:

• H-Series tri-metal construction for enhanced durability and load capacity
• 0.009 inch undersize specification for reground crankshafts
• Compatible with small block Chevy V8 engines including 265, 283, 302, 305, 327, 350, and 400 cubic inch displacements
• Precision manufacturing ensures proper oil clearances and bearing life
• Complete set includes all main bearings needed for engine rebuild

This bearing set is ideal for engine rebuilds where the crankshaft main journals have been machined to 0.009 inch undersize to remove wear or damage. The H-Series design provides excellent performance characteristics for both street and performance applications, with tri-metal construction offering superior strength and wear resistance compared to standard bi-metal bearings.