Federal Mogul 6634M20 Engine Crankshaft Main Bearing Set Undersize - 020

The Federal-Mogul 6634M20 is a crankshaft main bearing set sized .020" undersize, designed for engine rebuilds where the crankshaft has been reground to the .020" undersize specification. Federal-Mogul is a globally recognized OEM and aftermarket supplier of precision engine bearings, trusted by professional engine builders for decades.

Key Features:

• .020" Undersize — engineered for use with crankshafts that have been reground .020" below standard journal diameter
• Manufactured to tight tolerances for proper oil clearance and optimal crankshaft support
• High-quality bearing material provides excellent wear resistance, fatigue strength, and corrosion resistance
• Steel-backed construction ensures a precise, stable fit in the bearing bore
• Complete set includes all main bearing shells required for a full engine installation
• Meets or exceeds original equipment specifications

The Federal-Mogul 6634M20 main bearing set is an ideal choice for engine rebuilders performing crankshaft regrind work, offering reliable performance and durability backed by Federal-Mogul's long-standing reputation as a leading engine bearing manufacturer.