Rep Power: 0

i saw an "intake sensor" on ebay today for like 9 bucks. it claimed to add up to 20 hp with no sacrifices in warranty or gas mileage. does anyone know anything about these? will they ruin your engine or void your warranty in any way? do they deliver on the performance gains they advertise? sorry i dont know a whole lot about aftermarket parts and id like to add a little more power to my '03 ex. please tell me what you know. thanks

 
Rep Power: 812

It's a resistor or something to fool your car. Yes it will ruin stuff, no don't get it.

 
Rep Power: 311

i got one, did nothing.. good or bad.