Brand ?KAX Interchange Part Number 21-537 Pulley Included No Number of Pulley Grooves 0 Reservoir Included No Outlet Quantity 1 Outlet Thread Size M16 x 1.5 Reservoir Cap Included No Pulley Attachment Type Spline Introductions The steering column consists of three major components, a steering shaft, a shift tube, and a column or mast jacket. The steering shaft connects the steering wheel to the steering gear unit through a universal joint type coupling. The steering column is for connecting the steering wheel to the steering mechanism by transferring the driver's input torque from the steering wheel. The power steering pump/vane pump, is a system driven by the movement of the crankshaft by means of pulley and belt. Steering components are designed to maneuver the car easily and in the direction indicated by the steering wheel.Fitment2003 - 2009 Lexus GX470 Without Pulley / Without Reservoir 2003 - 2009 Toyota 4Runner 4.7L / Without Pulley / Without Reservoir Package Including1 x Power Steering Pump