6B1997H-.25

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.

Tunnel [mm]	60.000 / 60.024
Shaft [mm]	56.976 / 57.000
Max. Wall	1.502
Max. Length	14.5
Half type	Identical halves

Compatibility
Acura	MDX (YD2)	3.7 V6 4WD	10.2006 - 04.2013	J37A1	6	6B1997H	3664 cc	SOHC 24V	-.25	90.0	96.0
Acura	MDX (YD2)	3.7 V6 4WD	10.2006 - 04.2013	J37A2	6	6B1997H	3664 cc	SOHC 24V	-.25	90.0	96.0
Acura	RL	3.7 V6 4WD	09.2008 - 04.2013	J37A2	6	6B1997H	3664 cc	SOHC 24V	-.25	90.0	96.0
Acura	TL (UA8, UA9)	3.7 V6	01.2009 - 12.2013	J37A4	6	6B1997H	3664 cc	SOHC 24V	-.25	90.0	96.0
Acura	TL (UA8, UA9)	3.7 V6 4WD	01.2012 -	J37A4	6	6B1997H	3664 cc	SOHC 24V	-.25	90.0	96.0
Acura	ZDX	3.7 V6 4WD	01.2010 -	J37A5	6	6B1997H	3664 cc	SOHC 24V	-.25	90.0	96.0