So i've been asking around about what i can do to improve my handling. I'm interested in getting wider/lighter wheels for started, i'm going to get stiffer sways, but i'm not sure about what to put into the suspension. I know that progressive springs will give me a softer ride but more than likely i'll be driving the 350Z less on a daily basis and more on the weekends so does anyone have any ideas on what I can do to really stiffen up the suspension? would some linear KW springs make a big differance ?

 

find out the spring rates on the springs you want, and see how much stiffer they are than stock. There is a thread here somewhere that lists springrates for a bunch of brands. But usually linear springs are stiffer than progressive ones.

 

Have you tried doing a search? There's already a sticky thread in this sub-forum addressing your concerns regarding springs available for our Zs.