There actually is a very large range of area between drag racing and pro touring. Heck, even pro touring its self can be ill defined as some simply see it as 18" wheels and tires with no other mods while others see it as complete replacement chassis using beyond competition components.

Improved street performance is easy. Add some chassis stiffening, step up rates in springs, bars, and shock, have fun. You can take it further by adding improved steering, larger brakes, and larger diameter wheels with better performing tires if you chose.

Do you want a packaged approach or piece meal? In its simplest form, you can call the guys at Firm Feel or Hotchkis and order up a complete package that will transform your ride. Or, you can buy in pieces and upgrade over time in incremental steps.

The problem you will run into about application is, unlike drag racing that has an e.t. or m.p.h., street performance, ride quality and performance handling can be significantly different among different drivers. So there isn't a clearly defined line about what package X will produce over package Y.