Main bearings STD Chevrolet 396, 402, 427, 454 V8 Race Series CT-1 ACL coating ACL-5M829HC-STD

Main bearings STD Chevrolet 396, 402, 427, 454 V8 Race Series CT-1 ACL coating ACL Race bearings are designed to work in the most extreme conditions and the most demanding engines. The advanced technological process allows the bushing to adapt to the deformation occurring at high revolutions 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. : 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)