lowering springs question
 

i have a 10th ae. i love the way my car handles but want it to be lower mainly in the rear. ive never ridden in a TII other than my 10th ae. so i dont know if they handle the same or if mine is a little stiffer. ive ridden in a n/a base and the handling was no where near mine. what im wondering is if i get lowering springs will it make my handling worse, or not as stiff, and what brand is the best for my situation. i have ms01s' w/ falken tires if that matters much?