E Charger

Hey all, my boyfriend and I like to work on our bikes and on our car when we have the time and money to upgrade.  Our latest moficiation was ininstalling a talking car alarm.  I was online this morning checking out some different products when I saw an electric supercharger.  It was significantly cheaper than your conventional supercharger AND it said you'd increase MPG.  Is this believable or a scam?  Because if it worked, and gave our car torque AND less time at the pumps, I AM IN!!