I was thinking about adding the quad race box.I am all ready seeing 1400 + EGT'S when pulling a good size hill with a 37 foot fiver.Quadzilla advertizes lower EGT'S and better fuel MPG for ford and chevy but not for dodge.??If I can't use the power on the hills where I need it what good is it.My EGT probe is in the side of the manifold above the turbo where it reads the hotest.On all the big truck's I have worked on over the years all of the EGT probes were in the exhaust behind the turbo.Has anyone asked cummins or holset how hot temps can be at the turbo.This turbo should be able to handle as much abuse as the turbo's on the big truck's pulling six miles of fancy gap with the fuel pedal to the floor. I am guessing all of the boxes leave a trail if you have to take it to the dealer for something.But as soon as they open the hood and see the BHAF stufed in the fenderwell they will go "HUMM".