Why do you want ot put a large sway bar on the rear of your car? Is this a street driving car? If so,don't do it, you will make your car more prone to snap oversteer as the car will become tailhappy if you are not carfull add into the fact that I have seen plenty of pictures of subframe tearout even with reinforcment kits, I think this is an ugprade that is not worth it for a car that is just going to be street driving, soft spring rates and a big sway will lead to sub frame tear out.