I am using Teins S tech on my sedan I have about 150 in stereo equipment as wellWetsuitxNinja said:OK well I am getting the urge to put some springs in, but I had a ? about having a heavy sub in the back ~150 pounds, would I be better off going with a spring set that has a larger drop in the front, or should I find some with a stiffer spring rate for the rears, or would progressive springs be the way to go for me? Im not looking to slam the car, just get rid of the wheel well gap.