hand held tuners
02-02-2011, 10:00 PM
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Staging Lane
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hand held tuners my friend has a 04 subaru wrx and he has a hand held tuner. with his tuner he can delete change the maps on he ecu and raise his boost settings, step up a 2 step, air fual, and other things and not sure how much power he gets but you can tell a difference. is a diablo hand held tuner do just about the same things? what all can you do? and does it make a difference?
