SYDERIS250 Posted June 29, 2009 Share Posted June 29, 2009 Hi all. I have just bought an '07 IS250 enhanced and would like to "Chip it up" for better KW and fuel economy. Have done this in the past for my 3 & 5 series Bimmers, so I am hoping the IS250 has something similar easily available. Quote Link to comment Share on other sites More sharing options...
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