jackie Posted January 28, 2007 Posted January 28, 2007 what is the difference betweenthe usdm and jdm p13. if your engine is pretty much just stock would the jdm p13 help at all. have any changes. i know the usdm p13 tops out at about 140 mph. and the jdm cuts off at 115. but i really need to know the power curve difference.
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