ACL RACE SERIES MAIN BEARING SUBARU EJ20 EJ25 ~ 5M8309H

Sizes	STD, .025, .25, .50
Oil Clearance
Half Type	Identical halves
Material	F780
Min. Std Shaft Size	59,984 mm / 2.3616 in
Max. Std Shaft Size	60 mm / 2.3622 in
Min. Std Tunnel Size	64 mm / 2.5197 in
Max. Std Tunnel Size	64,02 mm / 2.5205 in
Max Wall at Crown	2,005 mm / 0.0789 in
Max Overall Length	19 mm / 0.7480 in (8297H) 15,12 mm / 0.5953 in (8298H) 22,92 mm / 0.9024 in (8309H(F))
Notes
Diagrams	8297H (1,5) 8298H (2,4) 8309H (5)

• 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

ACL RACE SERIES MAIN BEARING SUBARU EJ20 EJ25 ~ 5M8309H-STD