I have a 2000 Mustang V6 convertible. It has 101,000 miles on it. I'm
considering upgrading my suspension system since the shocks/struts are
shot and they have to be replaced.

I'm considering installing Speeda Sports Springs to lower the car
1-1/1/4" to improve the handling of the car. The springs are stiffer.
But I have some concerns about installing stiffer springs. What's the
trade-off? Do I need to be concerned about bottoming out the car over
speed bumps? Will the ride be a lot rougher?

Also, looking at installing Tokico HP shocks & struts when I replace the
springs. However, Steeda recommended a bump steer kit for all lowered
Mustangs with X2 Ball joints and/or caster camber plates. Do I really
need them for my mustang?

What about urethane spring isolators? Steeda recommends I get them
also, but I'm not sure what they do. Do I need to upgrade any other
suspension parts when I install the springs & struts? I was told I
should replace the worn bushings with harder ones. Any recommendations
on the bushings I should get?

 

You will bottom out on speed bumps, ride wont be as good with steeda's, but it will handle better. You dont need the kit but will be helpfull so i would get it. BBK, or B&M Bushings, forgot who makes em

 

with the 1.5 eibach pro-kit i didnt need CC plates or even an alignment...i might do the bumpsteer kit though