I have 2006 gmc duramx I just had the full bore exhaust manifold done,also added a edge insight for gauges and man the options are unreal does lots perimeters ,anyways I have been trying to source out what egt's are exseptable,what trany temps,what engine temps,and a good egt temp to shut off the eninge,I have nothing but good fed back on this sighgt ''diesel dude'' has been a mountian of helpful advice and I do apprictae it,next im getting bd's valve bodyhttp://dieselperformance.com/forum/images/smilies/smile.gif