Marsal420

Im going to be getting a set of 20" rims in a few weeks and i need to lift the rear end of the car because it's sagging extreamly bad , since i have around 400+lbs with sterio system equipment. i have heard i can put coil overs but i have hears about other things that i can do to raise the suspention of the car so that it sists leveled.

Please if anyone has any other ideas please help me out i honestly need any little bit of information.

Thank you

Tony