I get around 600-800 at highway speeds and around 1100 in regen. These readings are lower then my Superchips Laser Gauge that shot craps...I've checked the resistance and it is within spec. so, I feel these numbers are ore accurate. Our post turbo exhaust systems run much hotter.

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7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake