I have a 2020 Nissan maxima sv. With aftermarket wheels. And sound system on my trunk. But my car is super heavy on the rear. I was thinking doing coil overs with 8k front springs and 10k rear spring rate. If I lowered my maxima do I need camber

 

The car when gain natural camber depending on how low u adjust the coilovers. No need for camber arms if your not building a stance car. Swift springs is the way to go you can choose each spring rate for front & rear. $200 each for just the front pair same applies to the rear. So you looking at about for $400+ for both