Not sure what the pro street kit is these days (i think it used to be the pro lowering kit), but if the kits are one in the same it's not going to give you 2 inches.
With that said, you don't want that much anyway.
If you really did, the sportline kit does that, but it's almost like taking the spring out completely.
Depending on how far you go, you can possibly need a bumpsteer kit (or offset bushings) and
camber caster plates.