King Engine Bearings MB639SM-STD Main Bearing Set Standard Size

The King Engine Bearings MB639SM-STD is a standard size main bearing set engineered for precision performance and durability. King specializes exclusively in engine bearings, applying over 60 years of expertise to deliver the highest quality products in the aftermarket.

Key Features:

• Standard size main bearing set for precise OEM replacement or performance rebuild applications
• Bulls Eye wall tolerance maintained at an incredibly tight ±0.0001 inch for superior consistency
• High-quality steel backing with advanced bearing material for excellent load capacity and embedability
• Precision-controlled manufacturing ensures optimal bearing-to-bore contact and heat transfer
• Designed using racing-proven technology suitable for street and performance applications

King Engine Bearings has been the trusted choice of professional engine builders since 1960. Their extensive product line serves automobiles, trucks, marine, aviation, and standby power engines. Every King bearing utilizes premium materials and advanced designs to ensure complete customer satisfaction and reliable engine protection.