ACL Main Bearings for GM LS Gen III-IV 120° Oil Groove Extra .025mm Clearance

ACL Main Bearings for GM LS Gen III–IV — 120° Oil Groove, Extra .025mm Clearance Brand: ACL. Engineered for GM LS Gen III and IV V8 engines, this main bearing set features a 120° oil groove and an extra .025mm (0.001") oil clearance for reliable performance and protection. Key Features Precision fit: Designed for standard crankshaft journal diameter used in GM LS Gen III–IV engines. 120° oil groove: Optimizes oil distribution to main journals for improved lubrication under high load. Extra .025mm clearance: Provides increased oil film thickness to reduce friction and protect during break-in or mild misalignment. Quality construction: Manufactured to ACL standards for durability, fatigue resistance and consistent tolerances. Benefits Enhanced lubrication and load capacity from the 120° groove design. Extra clearance helps prevent scuffing and preserves bearing life in hot or high-mileage engines. Direct replacement for GM LS Gen III–IV applications — easy installation into standard journal blocks. Ideal for rebuilds, performance upgrades or preventative maintenance where dependable main bearing performance is required. Verify engine model and crankshaft specs before ordering.