Bilstein EM46 Series shock absorbers are emulsion dampers that feature an all-steel smooth body construction and 46mm piston for motorsports applications.  The shock absorbers also include a large 22mm shaft severe duty 3 stage high temperature rod seal and can convert to coilover usage (kit sold separately).  EM46 Series shock absorbers are ideal for racers looking for a rebuildable shock with the ability to create and fine tune spring rate as a replacement or supplement for suspension springs.