Looking over the suspension dimensions of the 4 Cobalt models (LS, LT, SS, SS/SC) regardless of model -- the body height is the same. Measured just inside the pinch weld under the car from floor to flat surface inside the pinch weld is 8.82" front (21.4" rear of front wheel centerline) and 9.17" rear (22" forward of rear wheel centerline).

This is how Chevy did it:
Sus Mdl Tire "Z" "D"
FE1 LS P195/60R15 -.83" 9.37"
FE1 LT P205/50R16 -.91" 8.98"
FE3 SS P205/50R17 -1.02" 8.82"
FE5 SS/SC P215/45R18 -1.34" 8.39"
"Z"= bottom surface of cradle to bottom surface of balljoint
"D"= Bottom edge of upper spring seat to bottom of notch in lower spring seat

Basically, if you use FE5 springs on an LS (FE1) the front would lower .5" and the rear nearly 1". If you use FE3 springs on a LS (FE1) the front would lower .2" and the rear would lower .5"
Using FE3 springs on a LT (FE1) would provide very small changes.

Ref.: 2006 Cobalt Service Manual, V1, page 3-3

 

So what would u get if u take a complete SS/SC suspension and put it in a LS?

Nice write up BTW.

later

 

What are "Z" and "D"? Very good information, I'm interested in converting my suspension to SS or SS/SC.

 

does anyone know how much a pain in the ass it would be to swap LS suspension to SS/SC suspension? warrenty issues?

 

Im thinking not that hard. What will be a PITA is the rusted nuts and bolts. Thats why im gona use S/S fasteners to put everything back together. As far as the warrenty, it should be fine considering ur still using GM parts.

later

 

Not too hard really. Crateenginedepot.com sells a brand new FE5 suspension for $700 and change. You'd need to swap out springs, struts, shocks, control arms, and the front sway bar. I might've missed something in that but that is the heart of it. Put all that on, get an alignment and boom SS/SC suspension.