King Engine Bearings CR 405SI0.25 SI-Series Connecting Rod Bearing Set 0.25mm Undersize

The King Engine Bearings CR 405SI0.25 is a precision-engineered SI-Series connecting rod bearing set ground to a 0.25mm undersize specification, designed for the Mazda F8 and Kia Besta 2.2D diesel engines. This set is the ideal choice for engine rebuilds requiring an undersize bearing to restore proper oil clearance on a reground crankshaft journal.

King SI-Series Technology:

• Lead-free aluminum-silicon alloy — reinforced with 2.5–3% silicon content for enhanced strength on medium-load and nodular cast iron crankshaft applications
• Improved crankshaft finish compatibility — reduces microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshaft journals
• Optimized oil clearance — engineered to reduce wear, extend engine life, and minimize operating noise, vibration, and excess oil consumption
• Bull's Eye wall thickness tolerance — bearing wall thickness held to ±0.0001" for exceptional shell-to-shell consistency
• 0.25mm undersize — for use with crankshaft journals reground to 0.25mm under standard diameter
• Recommended for OE replacement, gasoline or diesel engine rebuilding, and performance engines with factory crankshafts

King Engine Bearings has been a global leader in precision engine bearing manufacturing since 1960, supplying bearings for automotive, light and heavy-duty truck, marine, and aviation applications. The CR 405SI0.25 is a direct-fit replacement that meets or exceeds original equipment specifications.

OEM Cross-Reference Numbers: F801-23-105, F801-23-108