well the price can vary depending on what you want. I can do all custom piping like the ones pictured for $400 shipped. or if your a DIY-er I can supply a universal piping kit with all the neccessary couplers and clamps for $300 shipped. (but it will require that you measure and cut your own pipes for your intercooler.
If you want an intercooler like the one this kit is designed for its a 22x10x3 with 2.5" inlets and nicely polished aluminum tanks. and they are $300 shipped. THey are very nice high quality intercoolers. dual weave fins and everything. Very top notch!
The pipes can be made to fit a bigger intercooler if you like. however that size is what fits the best in the front bumper of the car. I wouldnt recommend doing anything bigger.