How far can we go with std BF Typhoon ?

[B&D Racing]

Hi Chris , my name is Brent , i have a good friend on the coast by the name of "DAZZLER" i,m sure everyone has heard of him ....
Anyway he changed my thermostat on the weekend and fitted the Airbox that was on his car to my car so the question now is .. How much for a flashbox + custom tune keeping in mind i WONT be changing fuel pumps or injectors any time soon ?
But we both plan to race this car at street meets for a few months anyway ......