ok well i bought the mac LT's. and i changed the poll. so now which tuner/chip is good. The fuego one sounds like it will do everything i want it to and comes with tunes for the different octane gases. besides the "performance" aspect of the tuners, I NEED ONE THAT WILL TURN OFF THE REAR O2"s. because of my o/r x pipe. i am assuming that the difference between a tuner a chip is that a tuner can be adjusted and a chip is just that, a chip with no adjustment right?