King Engine Bearings CR6727SI0.5 SI Series Connecting Rod Bearing Set Oversize - 0.50mm

The King Engine Bearings CR6727SI0.5 is a complete connecting rod bearing set engineered for the Toyota 1FZ-FE 4477cc inline-six engine. Part of King's SI Series, this set is supplied in a 0.50mm oversize dimension to accommodate reground or worn crankshafts during engine rebuilds.

SI Series Technology:

• Silicon-Reinforced Bi-Metal Construction — The SI Series uses an aluminum alloy strengthened with 2.5–3% silicone, improving on conventional bi-metal designs and offering performance comparable to traditional tri-metal bearings
• Lead-Free Material — Environmentally responsible, lead-free aluminum-based bearing material optimized for OE replacement and medium-load engine applications
• Nodular Cast Iron Crankshaft Compatible — Approximately 40 HV hardness rating makes these bearings especially well-suited for engines running nodular cast iron crankshafts
• Application-Specific Engineering — Precision-engineered specifically for the Toyota 1FZ-FE engine rather than a generic, one-size-fits-all design
• "Bull's Eye" Wall Thickness Tolerance — King maintains rod bearing wall thickness tolerances to ±0.0001", tighter than industry standard, ensuring consistent shell-to-shell fitment
• 0.50mm Oversize — Designed for use with crankshafts that have been reground 0.50mm undersize

King Engine Bearings has specialized exclusively in engine bearings since 1960, applying lessons learned from motorsport to produce premium OE replacement and performance bearings. The SI Series delivers a reliable, cost-effective solution for engine rebuilders servicing daily drivers and stock displacement engines under medium-load conditions.