ACL Race Series Main Bearings 4M2505H-STD Standard Size

ACL Race Series Main Bearings - 4M2505H-STD (Standard Size) Brand: ACL | Model: 4M2505H-STD Upgrade your Nissan VR38DETT (GT-R) engine with the ACL Race Series Main Bearings in standard size . Engineered for high-performance and competition use, these main bearings deliver superior durability, precise fitment, and consistent oil film protection under extreme conditions. Key Features Race-proven construction: Designed for motorsport and high-stress applications to withstand elevated loads and RPMs. Optimal materials: Multi-layer bearing technology provides excellent fatigue resistance and wear control. Precision fit: Standard (STD) sizing ensures exact OEM tolerances for the VR38DETT crankshaft journals. Enhanced oil control: Superior surface finish and geometry maintain stable hydrodynamic film and reduce metal-to-metal contact. Reliable performance: Improves engine longevity and reduces risk of bearing failure in tuned or high-mileage builds. Why Choose ACL Race Series ACL is trusted by professional engine builders and tuners worldwide. The 4M2505H-STD main bearing set is specifically manufactured to meet the demanding requirements of the Nissan VR38DETT powerplant, offering a balance of strength, precision, and long-term reliability. Applications: Nissan GT-R (VR38DETT) — ideal for high-performance street, track, and racing engines.