Mitsubishi STD main bearings 4D30, 4D30A, 4D31, 4D34 3298cc DIESEL ACL ACL-5M1198-STD

Mitsubishi STD main bearings 4D30, 4D30A, 4D31, 4D34 3298cc DIESEL 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 bushing adjusts to the deformation generated at high RPM and helps in the formation of hydrodynamic oil films. This technology, combined with the advanced geometry of the bushings, makes them ideal for heavily stressed engines. Most bushings are also available in several other dimensions: 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)