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These are ACL's Race Bearings for the Subaru EJ20 / EJ257. The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from ACL Race Series high performance Trimetal engine bearings. * High strength overlay plate with reduced thickness for improved fatigue properties * Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing. * Increased crush for improved bearing retention * Elimination of flash plating on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing. * Increased eccentricity to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films. * 3/4 grooved Main Bearings to optimize bearing load carrying surface area and oil flow to the conrod bearings. * Tight consistent wall tolerances to help you maintain consistent clearances. * Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts.   These are the Standard thickness. These are the factory thickness, equivalent to the Cosworth Size 1 bearings or the OEM Subaru bearings. These are available in limited quantities, so get them while they last! Standard Size Main AND Rod Bearings
ACL Standard Size Main Bearings
MAIN BEARINGS ARE BACK IN STOCK AND READY TO SHIP!!!
ACL Standard Size Rod Bearings
ACL +.001 Size Rod Bearings
ACL +.001 Size Main Bearings
MAIN BEARINGS ARE BACK IN STOCK AND READY TO SHIP!!!
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