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IAT The IAT box changes the input to the PCM to make the Vehicle run rich,If it 100+ deg. outside you can set the box to make the PCM think it's 75 deg. I have a 68mm and 70mm TB for a 2001 4.7L,We found the restriction to be in the cats and exhaust on that engine and not the exhaust...

What size is the TB on the 2004 ,3.7L engine wonder if it will handle a 70mm from Bruce at B&K,I did install the IAT box and I guess i'll talk to Marty at KRC about reworking the cams.

Came over from the Dakota Board,Have 2004 Liberty 3.7L auto just added new American Racing Casino wheels and Kumho tires.