King Engine Bearings MB5521AM1.25 Main Bearing Set Chrysler Oversize - 2.2L 1.25mm

The King Engine Bearings MB5521AM1.25 is a crankshaft main bearing set designed for Chrysler 2.2L engines requiring a +1.25mm oversize journal diameter. This set is ideal for engine rebuilds where the crankshaft has been reground to restore proper clearances after wear.

King Engine Bearings engineered this set using their AM (aluminum-silicon bimetal) material, a standard aluminum-based alloy equivalent to SAE-783, well-suited for low to medium load engines. The aluminum-silicon construction offers excellent conformability and embeddability, allowing the bearing surface to adapt to minor surface imperfections while trapping and absorbing small debris particles to protect journal surfaces.

Key Features:

• Crankshaft main bearing set for Chrysler 2.2L engines
• +1.25mm oversize — designed for reground crankshafts
• AM bimetal aluminum-silicon alloy construction (SAE-783 equivalent)
• Excellent conformability and embeddability for long service life
• Bull's Eye Tolerance™ technology — precision wall thickness monitoring for consistent fit
• Manufactured to strict quality control standards for reliable engine performance
• Engineered for aftermarket engine rebuilding applications

King Engine Bearings has specialized exclusively in engine bearings since 1960, making them a trusted choice among professional engine builders and rebuilders. The MB5521AM1.25 set delivers the precision fit and consistent oil clearances necessary for a successful engine rebuild.