Perfect Circle MS2199H10 H-Series Main Bearing Set .010" Undersize GM LS

The Perfect Circle MS2199H10 is a high-performance H-Series main bearing set designed for GM LS-Series engines. This precision-engineered bearing kit features .010 inch undersize specifications for reconditioned crankshafts and is suitable for LS1, LS2, LS3, LS6, and other LS variants including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L displacements spanning 1997-2015 model years.

Key Features:

• TriMetal construction with hardened steel back and copper-lead alloy substrate
• Medium eccentricity design with high crush for superior retention
• Enlarged chamfers provide greater crankshaft fillet clearance
• Thin overlay design for improved load capacity and seizure resistance
• Manufactured without flash plating for better seating characteristics
• Made in Atlantic, Iowa USA

H-Series bearings were developed primarily for NASCAR and circle track racing applications but are well-suited for all types of high-performance and competition engines. The TriMetal design offers exceptional durability, conformability, and fatigue resistance, making these bearings the preferred choice among professional engine builders. Complete main bearing set includes all bearings needed for installation.