I'll be putting this together slowly as i have time. I'll do my best to make a breakdown of all the performance options available. Please ask questions here, but i'll request your post be deleted if it's a common question that can be answered in a quick search.
I'm too tired of misinformation and the same thread 100 times asking which springs are best and which shocks/struts to get...
FE5 suspension - 2005-07 years
24-mm front stabilizer bar
FE5 shocks and struts. The springs may be different from some FE3 models.
Larger front end links
FE5 suspension - 2008 and up years
24-mm rear stabilizer bar
NEW FE5(LNF) shocks, struts, and springs.
Updated front knuckle
Both SS/SC and SS/TC springs lower the car by ONLY 10mm. That's less than half an inch.
SS/TC springs are ~30% stiffer than the SC springs.
Either one will be a great upgrade to any FE1/FE3 car. SS/SC stuff can be had cheaply, SS/TC stuff is better.
The alloy FE5 arms are an excellent upgrade to any FE1/FE3 Balt or Ion.
(Keep in mind if installed on an Ion, they will increase camber a fair amount)
Good read on Cobalt Front Suspension by Qwikredline
LNF/FE5 Part numbers
Sway bar: 15782696
Clamps: 10389617(same as 06-07 FE5)
Rear Axle: 25864579
Links: 20784688( ALL FE5 same)
Frt Springs: 25833647(L/R same)
Rr Springs: 25821162
Lower control arm: 25930725/15803767( L/R, right same on ALL FE5)
Knuckle: 25923942/25923941(L/R, unique to LNF)