ACL Bearings 4M8147-.25 Main Bearing Set 0.25mm Undersize for Mazda V6 K8 KL

The ACL Bearings 4M8147-.25 is a precision-engineered main bearing set designed specifically for Mazda V6 engines ranging from 1844cc to 2497cc with K8 and KL engine codes produced from 1992 to 1998. This set features a 0.25mm undersize specification for use with reground crankshafts.

Performance Features:

• Enhanced material composition and dynamic thickness for superior bearing capacity compared to standard bearings
• Improved heat conduction and optimized oil groove design for better oil distribution
• Increased bearing eccentricity to compensate for bore distortion during high-speed operation
• Higher radial contact pressure for improved bearing retention and more effective heat dissipation
• Enlarged inner diameter chamfers to accommodate larger fillet radii on performance crankshafts

About ACL Race Series:

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, with proven performance from sport compact drift racing to NASCAR competitions. The unique combination of design, metallurgy and engineering provides Race Series bearings with the endurance and capability to perform where others cannot.

This undersize bearing set is precision-manufactured for engine rebuilds requiring crankshaft grinding. The 0.25mm undersize specification ensures proper bearing clearances when matched with correctly machined crankshaft journals.