I plan on getting both front and rear sway bars. Which one should I get first?

 

Why do you want to upgrade both front and rear?

 

Most only do the rear..

 

A bit of explanation for RedSox53: As delivered, MINI's (and most cars) understeer. In order to overcome that, you stiffen up the rear sway bar by increasing its thickness and, if necessary, shorten the length of the sway bar arms where they connect to the droplinks. Most folks find it counter-productive to stiffen the front sway bar as it will counteract what you just did in the rear.

 

Yup...
Just do the rear....
Very few (the parts at the height of gen1 mini use were hard to find, now down right rare) folks ever did the front...harder to install, and generally counter productive.
Pick the rear based on your use....IMO mildly bigger for street, or huge hollow if you will spend time on the track....but one caveat here....
If you plan on getting camber plates at a later time, you need less of a increase in the size of the rear sway bar....

 

Start with just installing an Hsport Comp Rear Sway Bar and drive the car. You'l find you prob. don't need the front bar as it is for real serious track cars.

 

Another outstanding mod to go along with the RSB is a set of KONI FSD struts. They are available on sale right now from Way for just about half price.