ACL Bearings 5M8309A-.25 Duraglide Standard Main Bearing Set 0.25mm Undersize

The ACL Bearings 5M8309A-.25 is a complete main bearing set designed for precision engine rebuilds requiring 0.25mm undersize bearings. This set features ACL's proprietary Duraglide bearing material, engineered to provide superior wear resistance and extended service life in high-performance and standard applications.

Key Features:

• Duraglide bearing surface technology for enhanced durability and load capacity
• 0.25mm undersize specification for machined crankshafts
• Standard main bearing set configuration
• Precision-manufactured to OEM tolerances
• Tri-metal construction with steel backing for dimensional stability
• Advanced overlay material for improved oil retention and friction reduction

ACL Race Series bearings are trusted by engine builders worldwide for their consistent quality and performance. The Duraglide material provides excellent conformability to the crankshaft journal while maintaining the strength needed for demanding applications. Ideal for professional engine rebuilds where precision fitment and reliability are critical.