Ultima | Heavy Duty Gas Shock Torsion Bar Front 265/412 | Various Applications | 400017Ultima Heavy Duty Gas Shock Strut (Single) 400 Series The Ultima 400017 is a high quality, Heavy Duty Gas Shock Strut from the Ultima 400 Series, specifically tailored for vehicles with a Torsion Bar Front Suspension. This is a builder style shock, with its fitment defined by key dimensions: 265mm compressed and 412mm extended. It is engineered to deliver superior durability and consistent damping, essential for maximizing handling and control in