Our 500 Series™ Box is truly the best of its kind. A direct replacement for the factory power steering box or an easy way to upgrade from manual steering to power steering. The 14 to 1 ratio adds a new dimension of handling to your car, smooth operation and excellent road feedback. This box works with factory POWER steering pitman arm. Both the 400 Series™ & 500 Series™ have a ¾" -30 input shaft and use inverted flare hoses (11/16" -18 pressure fitting & 5/8" -18 return fitting). These are the perfect solution for your bolt on performance power steering needs!