ecoboostdoug Posted October 2, 2013 Report Share Posted October 2, 2013 Im about to buy the stage 4+. Do i have to have the cold plugs and 170 tstat? I can understand the cold plugs but tstat? Also whats the added hp gain from stage 4+ compared to stock? Thanks! Ive been searching and cant find any info!! Quote Link to comment Share on other sites More sharing options...
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