ACL Bearings 5M1644A-.25 Duraglide Main Bearing Set Oversize - 0.25mm

ACL Duraglide main bearings feature a heavy-duty tri-metal copper-lead construction engineered to deliver high strength and exceptional durability under demanding operating conditions. The F780 tri-metal material system combines a steel backing with sintered copper-lead-tin lining and lead-tin-copper overlay, providing superior strength accompanied by excellent anti-seizure properties.

Key Features:

• Main bearing set includes 6 bearings with oil grooves and 4 without, with the #4 journal receiving oil grooves on both sides
• 0.25mm (.010") oversize for use with reground crankshafts
• F780 tri-metal composition featuring sintered copper-lead, lead plated, steel backed construction with nominal composition of 74% Copper, 24% Lead, 2% Tin
• Provides widest range of load carrying capacities with excellent durability
• Tri-metal composition substantially lowers friction and reduces operating temperatures while providing superior lubrication

Duraglide bearings are designed to withstand harsh and demanding operating conditions, making them ideal for performance engines and rebuilds. These bearings are manufactured to exacting tolerances and are widely used by professional engine builders for both street and performance applications.