What is the 3rd steering bushing use for?

[Kenji001]

http://i24.ebayimg.com/06/i/000/db/28/c391_1.JPG

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?

[projectRDM]

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

[Kenji001]

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?