Blown72chevelle Posted September 29, 2015 Report Share Posted September 29, 2015 Hi I just picked up a 2003 ss Silverado and the only things I have done to it are volant intake pacesetter headers 2 1/2 exhaust with x pipe and magnaflows I was wondering if they autocal would make that much more of a deffirence compared to a traditional tune ? Quote Link to comment Share on other sites More sharing options...
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