DONT BUY IT! HUGE $#*! SCAM!
I wish I read these reviews before I bought it. It is a complete scam and there is nothing inside the performance chip but wires soldered together and a bull$#*! dial that does nothing. The O2 Sensor chip is nothing but wires put together wrapped with black shrink wrap and fitted in the container with Hot Glue... There's no returning the item so I took these pieces of $#*! apart. Glad I read reviews before put it on my car...