Originally Posted by ldstang50
If you want to make your Evo handle a little better without the sacrifice of a stiffer/lower ride, sway bars are what you need.
They make adjustable sway bars and varying sizes.
I completely agree with Warr, the strut braces will do nothing good for you, unless of course you want the bling factor.
An STB in the front of these cars will help, being a macpherson strut car. In the rear they are not going to do much.
It's true that an antiroll bar can produce the same effect as stiffer springs in some aspects without the sacrifice in ride quality that you'd normally expect from stiffer springs, but ARB's and springs do not the place of the other in a suspension system. They both work in a way that the other cannot, and so they should complement each other - specifically, ARB's are used as a tuning device. They do NOT take the place of springs, or vice versa.
As a simple example, a spring on one corner has no ability to equalize load between it and the other corner, and that is precisely what an ARB will do. Likewise, an ARB cannot control the motion of one wheel without affecting the performance of the other, ARB's reduce the "independentness" of an independent suspension. It's not as bad as it sounds unless you go stupid with your ARB, but it's also not a good idea to think of ARB's and springs are any sort of replacement for each other.