I didn't think you guys sold anything like this. I'm afraid this may be one of those 'snakeoil' resistor chips...We don't sell anything like that...those products that trick your computer are not good to use on your car.
All of the tuners we sell plug into your ODBII port to reflash the computer with a complete and safe tune optimized for your Mustang.
Do you know where did your cousin get this "tuner"...I would be very interested in finding out the identity of somebody selling something under our name...especially if it was a scam item like these "power modules". :hihi: