we are running this on the wifes 24v it is the 62/65/13 ss we are very happy with it we are also running a tst power max 3 and fass 150 stock sticks and the egts pulling my 98 3500 puller on the gooseneck witch combo weight over 12000 lbs we have not seen over 1200* pre turbo and that has been pulling over some summits here in idaho and utah but she does need a stronger clutch we did opt for the pollished exhaust houseing and we are seeing a little discoleration but not much but we are very happy with it and have seen about . 5 to 1 mpg increese hand caclutaing since we put it on