ok your sig threw me. its really up 2 you on the probe, wether the minimal power gains from a chip will be worth the cost of the chip. if it was for a V8 with heavy mods i would spend the money for the chip in my opinion due to seeing better power increases. for a relatively stock motor 4cyl. or 6 cyl. probe 10 to 20HP if even that might not be worth the amount of money 2 aquire it to me.