King Engine Bearings CR814SI020 SI-Series Bi-Metal Connecting Rod Bearing Set .020" Undersize

The King Engine Bearings CR814SI020 is a complete connecting rod bearing set engineered for the Ford 351ci (5.8L) 16-valve engine. This set uses King's SI-Series bi-metal construction, featuring an aluminum alloy base strengthened with 2.5–3% silicon — a lead-free formulation purpose-built for reliable OE-replacement performance. The .020" undersize designation makes this set ideal for engines with reground or worn crankshafts that have been machined 20 thousandths of an inch under standard journal diameter.

Key Features:

• SI-Series Bi-Metal Construction: Aluminum alloy base enhanced with 2.5–3% silicon for improved strength and wear resistance
• Lead-Free Material: Environmentally responsible formulation that meets modern OE replacement standards
• .020" Undersize: Designed for use with crankshafts that have been ground .020" under standard journal size
• Improved Wear Resistance: Silicon particles help condition journal surfaces, reducing friction and related wear over the life of the engine
• Reduced Wall Variance: Unplated bi-metal construction delivers up to 40% tighter wall thickness tolerances compared to tri-metal overplated bearings
• Improved Oil Clearance: Helps maintain OEM oil clearances over engine life, reducing noise, vibration, and excess oil flow
• Ideal for Nodular Cast Iron Crankshafts: SI material is specifically suited to medium-load engines using nodular cast iron cranks

King Engine Bearings has been a specialist in precision engine bearings since 1960, supplying the automotive, heavy-duty truck, marine, and aviation industries. The CR814SI020 is an excellent choice for engine builders performing a rebuild on a Ford 351W (Windsor) with a reground crankshaft, offering OE-quality fit and durability without compromise.