Tuning Program For Stock ECU (KA24DE)????

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HEY GUYS i was wondering if there is any kind of mapping program for the ka serious and or maybe a tuning system to do some tuning on fuel curves and things of that sort. I heard about niz-tune but didnt know much about it. My friend has a STI and he got a mapping program and tuning from one of his friends that tunes and maps. Just asking trying to get some ponies out of the under-rated ka everyone swaps out befor i turbo this beast. Any suggestions would help thx.