Sealed Power CB1238P Engine Connecting Rod Bearing Set 0.020" Undersize

The Sealed Power CB1238P is a 0.020-inch undersize engine connecting rod bearing designed as an OE-quality replacement for GM and Chevrolet applications. This part has been superseded by Sealed Power part number CB4020AL, which is the current equivalent replacement bearing.

The CB4020AL replacement bearing is an A-Series bi-metal aluminum alloy connecting rod bearing engineered to deliver reliable performance and longevity in rebuilt or high-mileage engines. Sealed Power manufactures these bearings using ISO and QS certified processes to meet the demands of modern and classic GM powerplants alike.

Key Features:

• Superseded by Sealed Power CB4020AL — direct equivalent replacement
• A-Series aluminum alloy construction for greater seizure resistance compared to tri-metal material
• Silicon-enhanced alloy helps polish the crankshaft journal, reducing wear during operation
• Steel-backed design provides strength and precise fitment
• Manufactured to ISO & QS certified standards
• 0.020-inch undersize for use with reground crankshafts
• Sold as a set; most applications require 6 bearings

Cross-Reference / OEM Part Numbers: CB1238P, CB1238A, CB4020AL, 4020A, 12480255, 12480266

Sealed Power has been a trusted name in engine components for decades, providing replacement parts that meet or exceed original equipment specifications for a wide range of domestic vehicle applications.