ninerrip Posted February 3, 2013 Report Share Posted February 3, 2013 I just purchased a new 2013 Shelby and would like to add some mods. Would you guys recommend the Lethal 680 package or should I make the two hour drive to American Muscle for a custom tune? I'm sure they can add the Throttle body and air intake like the Lethal kit. Also, will these cars pass inspection with an off-road exhaust like the "x" pipe? Thanks for your help. Quote Link to comment Share on other sites More sharing options...
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