King Engine Bearings CR4059SI0.75 SI-Series Connecting Rod Bearing Set Oversize - 0.75mm

The King Engine Bearings CR4059SI0.75 is a +0.75mm oversize connecting rod bearing set from King's SI-Series, engineered for General Motors 138ci 2.3L L40 and LD2 16-valve engines. Designed as a precision replacement for engine rebuilding, these bearings deliver reliable performance in OE and aftermarket gasoline engine applications.

Material & Construction:

• Bi-Metal Silicon Aluminum construction — an aluminum-based alloy strengthened with 2.5–3% silicon content
• Optimized for medium load engines and engines equipped with nodular cast iron crankshafts
• Improved surface finish reduces microscopic ferrite peaks on improperly ground or polished crankshaft journals
• Precision-controlled oil clearances help reduce wear, extend engine life, and minimize operating noise and vibration

SI-Series Features:

• Recommended for OE replacement and aftermarket gasoline or diesel engine rebuilding
• Direct-fit replacement for straightforward installation during engine rebuild
• Manufactured to tight wall-thickness tolerances for consistent, reliable bearing clearances

King Engine Bearings has specialized exclusively in engine bearings since 1960, applying aerospace- and racing-industry manufacturing standards to every bearing in their product line. The CR4059SI0.75 delivers the quality and dimensional accuracy that professional engine builders demand.