Main bearings STD Nissan 1965-1982 A12, A14, A15 1237-1397-1488cc ACL ACL-5M2967-STD

Main bearings STD Nissan 1965-1982 A12, A14, A15 1237-1397-1488cc ACL ACL Race bearings are designed to work in the most extreme conditions and the most demanding engines. Thanks to many years of experience in the production of bearings, each set is perfectly matched to the engine. The advanced technological process allows the bushing to adapt to the deformation caused by high revolutions and helps to produce hydrodynamic oil films. : STDX -0.025 mm (looser than nominal) STD +0.000 mm (nominal) +0.025 mm (tighter than nominal) +0.25 mm (first shaft grinding) +0.50 mm (second shaft grinding)