ACL Main Bearings for GM LS Gen III-IV 270° Oil Groove .25mm Undersize

ACL Main Bearings for GM LS Gen III-IV — 270° Oil Groove, .25mm Undersize Brand: ACL Restore precision and reliability to your GM LS Gen III or IV engine with this premium main bearing set. Designed with a 270° oil groove and a .25mm (0.010") undersize, these bearings deliver superior lubrication control and consistent clearances for rebuilt or machined crankshafts. Key Features Fitment: Compatible with GM LS Gen III and Gen IV engines 270° Oil Groove: Optimized oil flow for improved hydrodynamic film and crankshaft protection .25mm / 0.010" Undersize: Ideal for engines with turned or ground journals High-Quality Materials: Durable alloy construction for long-lasting wear resistance Precision Manufacturing: Tight tolerances ensure consistent bearing clearance and reliable performance Benefits Whether you’re rebuilding for performance or longevity, these ACL main bearings help reduce friction, prevent seizure, and maintain oil pressure under demanding conditions. Perfect for race, performance, or high-mileage GM LS applications. Buy with confidence: ACL engineering ensures dependable OEM-level fitment and durability for your LS engine rebuild.