I just bought a stock Sport sway bar from somebody who upgraded; and I want to install on my Justa Cooper. What I have is the bar itself, and two bushings (?).

Is there anything else that I'm going to need to do the installation? For example, will I need some extra nuts & bolts? And if so, what sizes? Or is there some other part that comes standard on a Sport that that I will need that I don't have? From what I've read it seems that there is some kind of link on the Sport that gets re-used for an upgrade. Is this something that I will need to get for my Justa Cooper before I can complete the installation?

This is my first ever mod on my '03 Cooper that I bought used about six months ago. That's why I sound like I don't know anything, 'cause I don't!

 

Try this pdf on how to install the rear swaybar.
http://www.outmotoring.com/images/ho...bar_gen1_2.pdf

Using a lift is much easier. Two jackstands will work.
Invite some mechanically inclined friends over that own tools.
Having one or two large prybars might help get the bar into position with less fuss.

Takes about 2 hours to install.

Rear sway bar helps to stiffen the rear suspension to reduce understeer when cornering hard. It's won't help for normal street driving going at the speed limit. It doesn't increase ride stiffness for daily use.