Main bearings STD Ford 2011+ (5.4L) Supercharged (Aluminum block) V8 Race Series ACL ACL-5M5645H-STD

Main bearings STD Ford 2011+ (5.4L) Supercharged (Aluminum block) V8 Race Series ACL ACL Race bearings are designed to operate in the most extreme conditions and the most demanding engines. Thanks to many years of experience in manufacturing bushings, each set is perfectly matched to the engine. 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)