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Some pretty impressive (???) hp and fuel economy gains by G Force for the 5.7L hemi in the Grand Cherokee....and for sixty-nine bucks.!!!

Anyone have any real experience. Fact or hype.???
 

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Total hype. If you have a Hemi, buy a real tuner or this "Hypertech harness". If you have a Pentastar, wait for a tuner.
 
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