what size and type of sway bar should i use??

[Teknolust72]

Have you already done ALL your other suspension mods yet? Sway bars should typically be the LAST item you purchase since it drastically changes the balance of a vehicle in a corner.

By doing all your other mods first, you may find out that you dont need sway bars.

Definitely get Wheels/Tires first. (If you can't even put traction down, why are you even looking at upgrading your car?)
Next is suspension, so coilovers or shock/spring combo
From here, I like to get an LSD. Others will say get bushings done, before LSD, so I guess its more personal preference. But if your car is old, your bushings need to be changed out anyway.
Finally, get swaybars if needed.

I generally feel that S13/S14s are generally pretty neutral after doing all the recommended suspension upgrades, so I just use stock swaybars.

I'm spoonfeeding you info, so I must be in a good mood today......lol