Engine & Performance Warehouse MS1454P020 Clevite Main Bearing Set .020 Undersize

The Clevite MS-1454P-20 is a high-performance engine crankshaft main bearing set designed for GM 3.3L, 3.8L, and 4.3L V6 engines. This .020" undersize bearing set is part of Clevite's P-Series line, engineered for demanding applications including heavy duty use, motorsports, and street performance builds.

Key Features:

• Tri-metal construction with cast copper-lead material for superior strength and durability
• Increases fatigue strength by approximately 20% compared to powdered metal bearings
• Grooved upper halves with plain lower halves for optimal oil distribution
• Higher eccentricity and crush factor to compensate for high-load factors and engine distortion
• Micro-babbitt overlay provides exceptional embedability and conformability
• Steel backing provides structural strength while maintaining load capacity
• Suitable upgrade from bi-metal bearings due to increased load capacity
• .020" undersize for crankshaft machining applications

Clevite P-Series bearings are the most versatile replacement option suitable for most OE applications. The tri-metal design offers greater seizure resistance and provides a margin of forgiveness for engines that may not receive maintenance as frequently as recommended. This makes them an excellent choice for both rebuilds and performance upgrades on older GM V6 engines from 1978-2007.