It was related too a comment made...
Sorry mate I no longer work at the place anymore, it was on a patrol, we got the GTX30/76 back in October, took off the GT30/76 that was on our test truck and put the GTX on, from 4000 it started at 20kw, @ 5500 before the power died it was only around 12kw gain, for a 1500$ turbo it wasnt worth the gain, it was worth adding meth injection instead of the GTX. Though from a factory upgrade id go a GTX.