What is the 3rd steering bushing use for?
 

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I just bought the Energy Suspension steering rack bushing kit for my S13.

The kit contains 3 bushings.

1) Driver side
2) Passenger side
3) ?

What is the third one use for?

The supply the round passenger side bushing for both S13 and S14. Use the one you need, sell the other to an S14 owner.

I see. Thanks!

Actually, after I installed the two steering rack bushings, I didn't notice a difference. Maybe it's because my tie rod/tie rod ends and tension rod bushings are bad as well? Or should I install the metal steering column bushing?