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Discussion Starter #1
My brother owns a (and ill confirm this later tonight) but im pretty sure its an 05 mazda6 2.3 I4.

anyways, I know with my ecotec tuning is available to improve MPG's by retarding the timing, are their people who can do this for mazda 6's? im also not talking about tuning it myself using MS or something, more like do you all have a working mail order tune?
 
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