Your S13 240SX may be as typical as most of them i've seen these days, always got torn steering rack boots and no one ever bothers to replace them.  Well if you only knew the damage it causes when dirt, water, debris gets in there and the cost of replacement of a steering rack, you'll be in a hurry to fix it!  It costs well over $1K to replace the steering rack, over a simple cheap part as this??? Seems stupid to pass up doesnt it?  Replace it today!!

This is only for one side.