ACL Bearings 4M2633HX-STD Race Series Main Bearing Set Standard Size with Extra Clearance

ACL Race Series main bearings are manufactured with tri-metal construction featuring a hardened steel backing designed to withstand high RPM conditions, high stress loads, and high temperatures. This 4M2633HX-STD bearing set is engineered with F780 tri-metal material for Nissan VQ-series engines including VQ20DE, VQ25DE, VQ30DE, and VQ35DE applications.

HX Series Extra Clearance Design:

The HX designation indicates these bearings are 0.0005 inch thinner per half to provide 0.001 inch extra oil clearance for standard-sized crankshafts, making them ideal for high-performance and racing applications where additional oil flow is beneficial.

Key Performance Features:

• Large chamfers to accommodate larger crankshaft fillets
• 3/4 groove design to provide optimum oil supply and maximize load carrying capacity
• Increased crush and tighter wall tolerances for better bearing retention and seating
• High-strength overlay plate with reduced thickness for improved fatigue properties
• Increased eccentricity to compensate for bore distortion at high RPM

ACL Duraglide F780 is a heavy-duty tri-metal copper-lead material engineered to suit demanding performance requirements. ACL Race Series bearings are recognized as a premier brand throughout the motorsports world and are standard components in race engines that compete in drift racing, NASCAR, IHRA, and NHRA competitions.

Specifications:

• Part Number: 4M2633HX-STD
• Bearing Size: Standard (STD)
• Bearing Material: F780 Tri-Metal
• Bearing Type: Upper and Lower Halves
• Extra Oil Clearance: +0.001"