ACL Race Series Main Bearings (+0.25mm Over Size, Set), '02-'14 WRX & '04-'21 STi

ACL Race Series Main Bearings (+0.25mm Over Size, Set), '02-'14 WRX & '04-'21 STi

Code: 5M8309H-25


Available For Order!

Product Description

  • 2002-2005 WRX
  • 2006-2007 WRX
  • 2008-2014 WRX
  • 2004-2007 STi
  • 2008-2014 STi
  • 2015-2021 STi
  • 2004-2008 Forester XT
  • 2009-2013 Forester XT
  • 2005-2009 Outback XT
  • 2005-2009 Legacy GT
  • Legacy GT Spec B

  • Fitment Notes: For crankshafts with a #5 journal bearing location
  • Brand: ACL Bearings
  • Series: Race Series
  • Manufacturer's Part Number: 5M8309H-.25
  • Size: +0.25mm
  • Primary Material: Metallurgy Mix
  • Primary Finish: Steel Backing
  • Manufacturer's Warranty: No Warranty
  • Pack Quantity: 8x Halves
  • UPC: 9315726311868
  • Condition: New Product
  • Kit Contents:
    (1) Full Set Of Crankshaft Main Bearings

Manufacturer's Description:
ACL Race Series Performance Engine Bearings

The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings.

Designed to withstand higher RPM conditions, ACL Race Series Engine Bearings are available for many of the popular 4, 6 & 8 cylinder applications and feature:

• 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.

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