Connecting rods 0.75 Subaru 1972-1978 EA61-EA71 1595cc ACL Race shells are designed to work in the most extreme conditions and the most demanding engines. Thanks to many years of experience in the production of shells, each set is perfectly matched to the engine. The advanced technological process allows the shell to adjust for high-speed deformation and aids 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)