He told me (on YT) that it is an all stock bottom end. I wonder if he is running such an enormous turbo to avoid scattering the bottom end at low rpm. It would seem to somewhat validate my theory of not building boost down low, but letting them twist a little. I see he uses NO2 to spool it up- doesn't appear to be streetable!Tyler has a cool build going on. Centermounted S372 turbo fueled by a 180cc R&D pump. Im friends with him on FB. It was awesome seeing him put down 493hp to the wheels over the summer. He's going for more next year. Hopefully he makes it down for KOS this year id love to see that truck run in person.