When I got my bushings I could definitely tell the difference, it felt like I got thicker sway bars all arround. Felt like about 30% stiffer then with normal bushings. The ride is deffinitly harder and you can feel every bump. But don't get fooled by the low price of the actual bushings, the work is what will cost you, plus u most likely will need some new bolts. Overall one of the better mods on my car IMO.
There might be a how to on here. Think the biggest hurdle is getting old bushings out of the lca's. Will have to torch and drill it out. I want to do this but my car is out of commission at the moment.