King Engine Bearings CR810AM020 Connecting Rod Bearing Set - Ford Y-Block 239 256 272 292 312 .020 Undersize

The King Engine Bearings CR810AM020 is a complete connecting rod bearing set engineered for Ford Y-Block V8 engines displacing 239, 256, 272, 292, and 312 cubic inches. This is a .020" undersize set designed for use with crankshafts that have been reground to .020" undersize rod journals, making it an essential component during engine rebuilds on these classic Ford powerplants.

These bearings utilize a bimetal (aluminum base) construction, featuring King's lead-free Alecular alloy material — an advanced aluminum-based compound that delivers excellent conformability, embeddability, and load-carrying capacity without the environmental concerns of traditional lead-based tri-metal designs. The aluminum base layer adapts to minor journal surface imperfections while safely embedding small debris particles to protect journal surfaces.

Key Features:

• Bimetal aluminum-base construction — lead-free Alecular alloy on steel backing for superior durability
• .020" undersize — engineered for crankshafts reground to .020" undersize rod journals
• "Bull's Eye" wall tolerance — bearing wall thickness held to ±.0001", far tighter than industry standard
• Precision surface finish — promotes proper oil film formation and reduces friction at startup and under load
• OE replacement quality — drop-in fit for Ford Y-Block engines with no modification required
• Environmentally safe — lead-free composite material meets modern environmental standards

King Engine Bearings has specialized exclusively in engine bearings since 1960, applying insights gained from motorsport applications to produce bearings suitable for both high-performance rebuilds and everyday street engines. The CR810AM series is a trusted choice for restorers and engine builders working on Ford Y-Block V8 engines found in classic Ford cars and trucks from the 1950s and early 1960s.