I have 03 Dodge Ram 1500-This Chip and oxygen surge (they call it) will do nothing for your vehicle except put the check engine light on.Puts out 2 codes. 1-the IAT code and 2- the oxygen sensor code. They tell me to take it to a mecanic.WHY? should I spend more money on this,it is supposed to be a simple install. So when I ask for a refund he ignores me and keep telling me to take it to a mechanic.So i told them I was reporting them on this website,I cut the pieces open an wow was i suprised what was inside of them.pictures attached email me for more pics