Perfect Circle MS2199H H-Series Main Bearing Set Standard Size GM LS Engine

The Perfect Circle MS2199H is a high-performance H-Series main bearing set designed for GM LS-series engines, including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L V8 applications (LS1, LS2, LS3, LS6). This standard size bearing set is engineered for competition engines and high-performance builds that demand superior durability and precision.

Key Features:

• Tri-metal construction with hardened steel backing and carefully selected thin overlay for maximum strength
• Medium level of eccentricity with high crush factor for optimal seating and oil retention
• Enlarged chamfers provide increased crankshaft fillet clearance
• Manufactured without flash plating for better bearing seating and break-in
• Optimized for medium-to-high RPM operation and competition use
• Standard bore size: 2.7509-2.7514 inches

Originally developed for NASCAR racing applications, H-Series bearings deliver track-proven performance and reliability. Ideal for engines with crankshafts featuring oversize fillets and high-RPM operation. This bearing set provides the durability and precision needed for demanding performance applications.