As a general rule, if you find a performance 'chip' that plugs into your air temp, MAF, or o2 sensor, stay far, far away! Doesn't matter if it is a boat or car, it is snake oil. It is nothing but a resistor which basically changes the values (+ or -) that those sensors send to the ECU in the car.
They won't make any additional power, at best it stays the same, most likely you lose power, and if you are really unlucky, the thing leans out your engine and you now have an 'unplanned upgrade opportunity!'
