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Ebay Speed Chips...
Whenever I browse Ebay I often see things for sale called "Speed Chip +20HP!!!" I find this very hard to beleive, it says it messes with the air/fuel ratio by simple placing it your IAT sensor... well anyways they are extremely cheap and I would definatly buy one, but It seems to good to be true. Has anyone here had one of these, if so, does it cut your MPG or hurt your engine?
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