[06GTMustang]

I got a question for yall. It may be an easy one or a stupid one. But when dealing with shocks and springs do they do different jobs? Or the same job? Or the same but different job at the same time? Lets say my car in a hard left turn (for example) sticks to the road well but has a lot of body roll. what should I change to help with the body roll? Shocks or springs? Or both? My car is all stock suspension and handles well but I'm looking for a little less body roll and I'm not wanting to lower the car too much due to going with side exhaust. Thanks for the input.