ACL Race Series Main Bearing Set Fits Toyota 1Gr-Fe 4M8263H-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-Material: F780-Min. Std Shaft Size: 71,988 mm / 2.8342 in-Max Std Shaft Size: 72 mm / 2.8346 in-Min. Std Tunnel Size: 77 mm / 3.0315 in-Max Std Tunnel Size: 77,016 mm / 3.0321 in-Max Wall at Crown: 2,497 mm / 0.0983 in-Max Overall Length: 22,4 mm / 0.8819 in (8263H), 19 mm / 0.7480 in (8264H)