Found this Jet thing under the hood, "Jet Chips Ignition Performance Module"
Previous owner says its been on there forever...
Done some homework and understand what it is and that im better off with Ryan's tune on a SCT... for somewhere around $450...
I read some conflicting stuff out on the forums that the PCM will eventually adjust to the Jet thing and basically just bring it back to stock...
Is that true ?
If it's not doing anything, just take it out ?
This is for a 01 4.7 5 speed... has 1 into 2 muffler, no name on it... sounds good though airraid CAI...