4205 x 1. Late XK140 & XK150 Brass Steering Rack Plunger. This is the component that exerts the pre-load pressure onto the sliding rackbar itself, so it is shimmed for setting up the correct steering  feel or pressure under the top cap with shimming washers. This brass piece can be cut down to fit the later rack designs, which just uses the lower disc (puck) section if necessary .Original Ref. C14002

Always ensure the steering rack unit is shimmed correctly onto the chassis for best performance to minimise steering drag. SEE :  4206 KIT

For Seperate 0.005" Thick Shims SEE : 3663

Or Seperate Shims 0.20" Thick  SEE : 3664