i can confirm that the tie rod ends from an S13 fit, and S14 don't... cause i done mine the other week and still have the S14 ones sat on my desk here.
but,... if you're talkin' about lower front ball joints, then you want S14 parts. they're 2 completely different parts.
for an "upgrade" of track rods and ends, you can use skyline ones.... they're thicker, exactly the same as the tein's..... not really needed unless doing alot of hard drifting, where the power is on alot whilst holding a lot of steer angle.
