Thirdly, jet chips are emissions legal. As mentioned previously, California which has the toughest emissions control laws, accepts jet chips because they have no effect on the emissions released from your car. Quite frankly, just because your car will get better fuel mileage, more horsepower, and better torque doesnt mean that it will emit more pollution. A jet chip makes your engine work more efficiently and an efficiently tuned engine doesnt over pollute.
One final note: If you elect to go with a jet chip versus a performance tuner, you will have to either remove the dashboard or go underneath the hood to swap out the chip. Not so with a performance tuner as all you have to do is plug the tuner into your cars under dash diagnostic connector, answer some simple yes/no questions, and before you know it youre engine is super tuned. Of course, it all depends on what make/model of car you drive as not all jet chips and not all super tuners are made for every car out there.
Some reviews say Jet chips dont work, but with the modifications I have done to my truck, without the Stage One chip my truck just doesn't run rite. Great product, great price.