The Fleabay chips can actually cause damage to the motor by inducing an overly LEAN condition "to save on fuel". Remember, if it sounds to good to be true, then, odds are, it is. A good chip is usually around $100 or better and it is something that information needs to be programmed into, not just a "run&gun" thing. Even the "Superchip" company will tell you that you still need to re-tune the engine after installing their chip, and they are one of the oldest out there.