Has anyone tried those Boss Performance Chips? They claim to increase horsepower and mpg. I guess they change the air/ fuel mix to make the motor fire earlier to give it more horsepower but in the long run I don't want to ruin my motor. I would really like to get better gas mileage.. (who wouldn't ) if it would help I would be willing to try it, but not at the cost of my motor. Any suggestions?

 

here is whats inside

 

Yep - it's just a $.10 resistor. Same thing with SLR and others.