ACL Bearings 5M429P-STD Small Block Chevy Small Journal Main Bearing Set

The ACL Bearings 5M429P-STD is a P-Series main bearing set designed for small block Chevrolet engines with small journal crankshafts. This set is engineered for engines with 2.30-inch main journals, including 265, 283, 302, and early 327 cubic inch small block Chevy applications. The standard size (STD) bearings are designed to fit factory crankshaft specifications without machining.

Key Features:

• 3/4 grooved design optimizes bearing load carrying surface area and oil flow to the connecting rod bearings
• Increased eccentricity to compensate for bore distortion at high rpm and assist in hydrodynamic oil film formation
• Enlarged ID chamfers on bearing edges accommodate large fillet radius on performance crankshafts
• Precision-engineered for reliable fit and consistent clearances
• Standard size for use with unground crankshafts

ACL Bearings, based in Launceston, Tasmania, Australia, has over 70 years of experience manufacturing high-quality engine bearings with ISO certified processes. The company is known worldwide for creating bearings that are durable, innovative, and precise. This main bearing set provides the quality and reliability needed for street performance and restoration applications on classic small block Chevrolet engines.