ACL Race Series Main Bearings 5M1144H-.25

ACL Race Series Main Bearings 5M1144H-.25 Brand: ACL — engineered for competition and high-performance engines. These Race Series main bearings are precision-made to meet the demands of boosted and high-RPM applications. Fitment: Designed for Mitsubishi 4G63 and 4G64 engines, including 6-bolt 1st generation DSM platforms. This set is 0.25mm oversized to support engines with line-bored or machined crankshafts. Key Features Race Series construction: Durable tri-metal/bi-metal materials for improved fatigue strength and wear resistance. 0.25mm oversize: Accommodates machined cranks, ensures proper oil clearance and bearing life. High-performance tolerance: Optimized for elevated loads, boost pressure, and high RPM operation. Complete main set: Includes all main bearings required for the crankshaft (standard 6-bolt configuration). Precision ground: Consistent thickness and roundness for reliable, repeatable installation. Why Choose ACL ACL is trusted by engine builders and racers worldwide. These bearings provide the strength and durability needed to protect your crank under increased power and aggressive tuning, while maintaining oil film integrity and reducing friction. Upgrade your 4G63/4G64 build with ACL Race Series Main Bearings 5M1144H-.25 — the choice for reliability in high-performance and track applications.