ACL Race Series Main Bearing Set Fits Holden Red Blue Black 253/308 5M2357H-STD

Located in Australia, ACL has been providing an extensive replacement product range to a global aftermarket for over 70 years. Their reputation for robust metallurgy, quality, precision, innovation &, of course, performance shows through their products.

SPECIFICATIONS
-High Strength Overlay Plate With Reduced Thickness for Improved Fatigue Properties
-Hardened Steel Backs on All Rod Bearings to Improve Bearing Lining & Retention
-Increased Crush for Improved Bearing Retention
-Elimination of Flash Plating on Back of Bearings & Maximise Grip Between Bearings & Housing
-Increased Eccentricity to Compensate for Bore Distortion at High RPM & Assist in Formation of Hydrodynamic Oil Films
-3/4 Grooved Main Bearings to Optimise Bearing Load Carrying Surface Area & Oil Flow to Conrod Bearings
-Tight Consistent Wall Tolerances to Help Maintain Consistent Clearances
-Enlarged ID Chamfers on Bearing Edges Where Required to Accomodate Large Fillet Radius on Performance Crankshafts
-Half Type: Upper & Lower
-Material: F780
-Min. Std Shaft Size: 60,904 mm / 2.3978 in
-Max Std Shaft Size: 60,93 mm / 2.3988 in
-Min. Std Tunnel Size: 65,8 mm / 2.5905 in
-Max Std Tunnel Size: 65,827 mm / 2.5916 in
-Max Wall at Crown: 2,423 mm / 0.0954 in
-Max Overall Length: 22,73 mm / 0.8949 in (2357H), 27,71 mm / 1.0909 in (2358H(F))