There are plenty of ways to get rid of body roll. Lowering springs, sway bars, etc. If you are looking to keeping it as stock as possible, I would go with the sway bar. There is a rear sway bar in the Group Buy section (Aussie Bar) that loweres the amount of body roll in the rear. You would probably be looking around $150-160 for that part. If you go with that one, I have heard that you must lower the gas tank a few inches to get it in, but other then that, it shouldn't be difficult. I plan on installing the one I ordered.
A strut tower bar will keep the car's body from twisting when you corner hard. I haven't priced one personally, but others on here have them.
I hope this helped!
