If you mount the turbo on the up pipe without the studs, it's much easier to install the turbo without damage to the inlet hose. The bolts are the same ones that hold the up pipe bracket to the block.
Oh, I also went with a stock inlet hose.
175,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. Also CHECK YOUR OIL, these cars use it.