Parts like HD truck size turbos? Did you see the size of the turbo on that linked page? Must have a 5" inlet. I'd think it's easier to run higher boost on E85, you'll just need even bigger injectors- ethanol is about 115 octane, right? There are plenty of rods that can take 900hp. They just cost a lot. How much over stock is 40psi on a Cummins? Taka