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I have a 2004 Rubicon with a 4.0L and am wanting try a performance chip and am wanting to know if anyone has tried either of these chips. I am thinking of either the Powerbox performance chip from Autochips direct for $59 or from PCD chips for $69.
 

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Dorito's are good
 

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If you havent done any major engine changes like forced induction/stroker/or cylinder head work, then any kind of chip will just be a waste.
 
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