All you would need after installation of the turbo itself is tuning. I think that you would be fine with a 190lph pump with that setup considering I am still running the stock pump with no problems.

You can upgrade the kit down the road if you decide. Here is what Greddy claims as base horsepower numbers with certain accessories:

Stock: 168hp
TD05-18G Turbo Kit w/o Intercooler: 235.2hp
Turbo Kit with Type 31 Intercooler: 261.4hp
Turbo Kit with Type 24 Intercooler: 270.3hp

Of course, these numbers can be improved a good amount with a good tuning setup like Hondata that has been tuned professionally on a dyno. There comes a point where adding more accessories to Greddy's kit doesn't satisfy and if you need more power, you should probably go with a kit that includes a larger turbo like a T3/T4. Also, increasing boost levels on the Greddy kit do not do much to increase HP. The kit is good to 300 hp and then it falls on it's face, so if you need more, look elsewhere.