ACL Bearings 4M2633H-.25 Race Series Main Bearing Set Oversize - 25mm

ACL Race Series main bearings are manufactured with a tri-layer metal construction designed to withstand high RPM conditions, high stress loads, and high temperatures. This .25mm (.010") oversize bearing set is engineered for Nissan VQ30DE and VQ35DE V6 engines with machined crankshafts.

Key Features:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all bearings to improve support and assist with bearing retention
• Increased crush for improved bearing retention
• Increased eccentricity to compensate for bore distortion at high RPM
• 3/4 grooved main bearings to optimize bearing load carrying surface area and oil flow
• Improved heat transfer through elimination of flash plating on bearing backs

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, with bearings used in race engines that have set records and won championships. These oversized bearings are used with crankshafts that have been ground .25mm (.010") undersize to restore proper clearances during engine rebuilds.