1990 Nissan pintra ca20e?

i have a 1990 Nissan pintra ca20e high proformance 4 cyc. i have extracters with a 2 1/2 inch sports exurst with a stanless steel canon 3inch inlet to a 4 inch out let. swapped the stock air filter to a sports pod. pioneer head unit with 6 1/2 inch 180 watt speaker inthe back window and 6 inch 2 way split in the door custum install. i am running about the 120 kw but i still want more power. i would like to put a turbo and plow of valve onto her chip the computer i would like to break the 160 -180 kw mark any one got any ideas