Federal Mogul 7289MA25MM Engine Crankshaft Main Bearing Set Undersize - 0.25mm

The Federal Mogul 7289MA is a precision-engineered crankshaft main bearing set available in 0.25mm undersize, designed for use during engine rebuilds where crankshaft journals have been machined or show wear beyond standard tolerances. Federal Mogul (now part of Tenneco) is a globally recognized OEM and aftermarket supplier trusted by professional engine builders and machine shops worldwide.

Key Features:

• 0.25mm Undersize — engineered for reground crankshafts with journals machined 0.25mm below standard diameter
• Manufactured to precise OEM tolerances for proper oil clearance and bearing crush
• High-quality tri-metal or bi-metal construction for durability and wear resistance
• Surface treatments designed to handle high loads, oil film retention, and thermal cycling
• Complete set includes all main bearing shells required for a full engine crankshaft installation
• Federal Mogul / Tenneco quality — trusted by OEM manufacturers and professional rebuilders

Designed for professional engine rebuilding applications, the 7289MA .25MM main bearing set ensures correct crankshaft-to-block clearances when using a reground crankshaft. Always verify journal diameters with a micrometer prior to installation to confirm the correct undersize bearing is selected.