The 1963-82 Corvette Power Steering Gear Box S84025BK is a vintage performance part constructed with brand new cast Iron castings and brand new internals components. Featuring a 13:1 steering ratio and a front steer mounting is a bolt-on fitment. This power gear box has a black finish and a universal fitment, making it suitable for a variety of Corvettes year applications. With an input shaft diameter of 3/4-30 spline and a turn lock to lock feature of three turns, this gear box offers reliable steering performance for classic Corvettes.