I have a 2001 audi a4 awd 5 spd and i recently added a straight piped exhaust with CAT delete pipe, ko4-15 borg turbo, audi TT DV, inlet hose, intake, 5 bar FPR. All i need now is the programming. Anyone have any insight? I know GIAC is prob the best way to go and iv hrd the hammer file is the better one for 01 cars but i wasnt sure if i can run that on my setup seeing i dont have the audi tt 225 MAF or injectors. If i can run it by just getting the MAF i will but just wanted to put this out there to see what everyone thinks.

 

I'd think out of those two factors, you'd need the injectors more than the maf. The hammer file is an off-the-shelf tune and if it's set up for larger injectors (which I imagine it is), the car won't run right unless you have them.