Well, it dependes on where you drive it. Each spacer will elevate the rig higher and higher off the ground. Usually, if you have big tires and a high suspension the handling will be adversly affected (It will get extremely "top-heavy" and tend to roll a lot more) if you raise it, it will def. make it diffrent to drive. As for "helping" your car, I guess i just don't understand what you mean. I don't see how it could help, unless you just want it to ride higher. good luck.