All versions are made with a high grade 4130 Chromoloy alloy tube (meets AISI standards) and laser cut for fitment using the same CNC process as our subframes and other tubular components. The trailing arms are available in 2 models, motorsport with bearings model for gravel, drag and circuit applications, street model for use with bushings; 1″ lowered ride height correction. You may order the arms with or with out the 95a graphite impregnated bushings (no lube necessary). The bearing model comes with Fluro MS bearings made to our special metric sizing (stainless steel, tight tolerance units with a PTFE liner). We have also introduced a gravel specific kit for professional use that has re-enforced mounting points and thicker gage tubing. Weight for the std bushing version is a 45% reduction. All units also feature our 2 step epoxy powder coat finish as standard for longevity and the ultimate in all weather resistance. Installation is a direct bolt in for all Impreza applications from 1993 up to 2007.