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...
SHOdded Posted October 2, 2013 Report Share Posted October 2, 2013 Ask away on Ecoboostperformanceforum.com if you want prompt & reliable answers And, BTW, welcome! Quote Link to comment Share on other sites More sharing options...
smokingozzy Posted November 17, 2013 Report Share Posted November 17, 2013 I have a 2011 MKS and have been running the stage 4+ program since it first came out. I still have my stock plugs and thermostat. Seems to run just fine!!! Quote Link to comment Share on other sites More sharing options...
bmc10sec50 Posted November 24, 2013 Report Share Posted November 24, 2013 Not sure about the plugs and Tstat but your looking at roughly 60hp with the tune. Quote Link to comment Share on other sites More sharing options...
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