Also - you can tune your ECU (hi-po or hi-mileage, whichever...) with CROME, UBERdata, TurboEdit, and a few others. I can't give the sites for them though, as that would be advertising, and it's borderline legal to modify an OBD-II vehicles Engine Control Systems, so I can't help anymore than that.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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