ACL Bearings 4B8172H-.025 Oversized High Performance Rod Bearing Set, 0.025mm

The ACL Bearings 4B8172H-.025 is a precision-engineered high performance rod bearing set designed for demanding engine builds requiring oversized bearings. This set features a 0.025mm oversize specification, making it ideal for engines with crankshafts that have been machined or ground to accept slightly larger bearings.

Key Features:

• 0.025mm oversized specification for machined crankshafts
• High performance tri-metal construction for superior strength and durability
• Precision tolerances ensure optimal oil clearance and bearing crush
• Advanced material formulation provides excellent wear resistance and fatigue strength
• Engineered for high-load and high-RPM racing applications
• Complete rod bearing set for engine rebuild projects

ACL Race Series bearings are manufactured using state-of-the-art production techniques and premium bearing materials. The tri-metal design incorporates a steel backing for strength, a copper-lead intermediate layer for load capacity, and a specialized overlay for superior embeddability and compatibility with modern engine oils. These bearings are trusted by professional engine builders and performance enthusiasts for everything from street performance to full race applications.

This oversized bearing set is essential when rebuilding engines with worn or machined crankshaft journals, ensuring proper clearances and reliable performance under extreme operating conditions.