ACL Bearings 5M429HC-STD Race Series Main Bearing Set with Calico Coating

The ACL Bearings 5M429HC-STD is a Race Series main bearing set designed for Chevrolet small block 265, 283, 302, and 327 cubic inch V8 engines. This bearing set features Calico CT-1 dry film lubricant coating, manufactured by ACL Race Series, recognized as a premier brand throughout the motorsports world with a unique combination of design, metallurgy and engineering.

Key Features:

• CT-1 coating provides intermittent dry lubrication with low coefficient of friction, chemical resistance, and corrosion protection
• Excellent embedability characteristics allowing debris contaminates to embed in the bearing, avoiding damage to the crankshaft
• Reduces oil temperatures by as much as 15°F to 20°F, helping maintain viscosity under extreme heat
• 3/4 grooved design optimizes bearing load carrying surface area and oil flow to the connecting rod bearings
• High strength overlay plate with reduced thickness for improved fatigue properties
• Increased eccentricity to compensate for bore distortion at high RPM
• Tight consistent wall tolerances to help maintain consistent clearances

Designed to withstand higher RPM conditions, ACL Race Series Engine Bearings feature hardened steel backs to improve support of the bearing lining and assist with bearing retention in the housing. These bearings can be assembled with 0.00075-0.001 inch per 1 inch of journal diameter plus 0.0005 inch.

The multi-layered tri-metal copper alloy construction blends characteristics to provide high strength and excellent seizure resistance, manufactured to exact tolerances ensuring a reliable fit. Standard size (STD) bearings are supplied as a complete main bearing set.