I have some spare S13 studs (brand new) if you need one. Email me at
[email protected], I'll send you one.
Pull the wheel off. Put an old lug not on the bad stud, thread it on to where 1/2 of the lug is threaded. Whack it with a large sledge, making sure to hit it evenly. It will pop right out.
Put the new stud in from the back. Put a washer, a couple bolts, and your lugnot on the stud, and tighten it down real good. You will hear the stud "seat" in the hub. Once you can no longer torque it, it's in (I recommend a little anti-sieze on the splines). Pull off the lug, the extra nuts, and the washer, remount your wheel, and roll.